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21353044 = 2259173523
BaseRepresentation
bin101000101110…
…1001001010100
31111011211212111
41101131021110
520431244134
62041400404
7346332526
oct121351124
944154774
1021353044
1111064949
127199104
13456824b
142b9ba16
151d1bc64
hex145d254

21353044 has 24 divisors (see below), whose sum is σ = 38293920. Its totient is φ = 10414944.

The previous prime is 21353029. The next prime is 21353047. The reversal of 21353044 is 44035312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40567 + ... + 41089.

It is an arithmetic number, because the mean of its divisors is an integer number (1595580).

Almost surely, 221353044 is an apocalyptic number.

It is an amenable number.

21353044 is a deficient number, since it is larger than the sum of its proper divisors (16940876).

21353044 is a wasteful number, since it uses less digits than its factorization.

21353044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 21353044 is about 4620.9354031408. The cubic root of 21353044 is about 277.4298997783.

Adding to 21353044 its reverse (44035312), we get a palindrome (65388356).

The spelling of 21353044 in words is "twenty-one million, three hundred fifty-three thousand, forty-four".

Divisors: 1 2 4 59 118 173 236 346 523 692 1046 2092 10207 20414 30857 40828 61714 90479 123428 180958 361916 5338261 10676522 21353044