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2021020002 = 232281463863
BaseRepresentation
bin111100001110110…
…0101000101100010
312012211220110020200
41320131211011202
513114340120002
6532313250030
7101040246411
oct17035450542
95184813220
102021020002
119478a4271
12484a03916
13262926b31
141525ab478
15bc665b1c
hex78765162

2021020002 has 48 divisors (see below), whose sum is σ = 4409054208. Its totient is φ = 669049920.

The previous prime is 2021019997. The next prime is 2021020003. The reversal of 2021020002 is 2000201202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2021020003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2341423 + ... + 2342285.

It is an arithmetic number, because the mean of its divisors is an integer number (91855296).

Almost surely, 22021020002 is an apocalyptic number.

2021020002 is an abundant number, since it is smaller than the sum of its proper divisors (2388034206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021020002 is a wasteful number, since it uses less digits than its factorization.

2021020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1612 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2021020002 is about 44955.7560496985. The cubic root of 2021020002 is about 1264.3195999399.

Adding to 2021020002 its reverse (2000201202), we get a palindrome (4021221204).

The spelling of 2021020002 in words is "two billion, twenty-one million, twenty thousand, two".

Divisors: 1 2 3 6 9 18 281 463 562 843 863 926 1389 1686 1726 2529 2589 2778 4167 5058 5178 7767 8334 15534 130103 242503 260206 390309 399569 485006 727509 780618 799138 1170927 1198707 1455018 2182527 2341854 2397414 3596121 4365054 7192242 112278889 224557778 336836667 673673334 1010510001 2021020002