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21190002 = 2373101479
BaseRepresentation
bin101000011010…
…1010101110010
31110212120012220
41100311111302
520411040002
62034101510
7345053301
oct120652562
943776186
1021190002
1110a633a9
12711a896
13450bc82
142b58438
151cd87bc
hex1435572

21190002 has 32 divisors (see below), whose sum is σ = 43476480. Its totient is φ = 6883200.

The previous prime is 21189977. The next prime is 21190003. The reversal of 21190002 is 20009112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21190003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43999 + ... + 44477.

It is an arithmetic number, because the mean of its divisors is an integer number (1358640).

Almost surely, 221190002 is an apocalyptic number.

21190002 is an abundant number, since it is smaller than the sum of its proper divisors (22286478).

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

21190002 is a wasteful number, since it uses less digits than its factorization.

21190002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 21190002 is about 4603.2599318309. The cubic root of 21190002 is about 276.7219860028.

Adding to 21190002 its reverse (20009112), we get a palindrome (41199114).

The spelling of 21190002 in words is "twenty-one million, one hundred ninety thousand, two".

Divisors: 1 2 3 6 73 101 146 202 219 303 438 479 606 958 1437 2874 7373 14746 22119 34967 44238 48379 69934 96758 104901 145137 209802 290274 3531667 7063334 10595001 21190002