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23019925 = 521948463
BaseRepresentation
bin101011111010…
…0000110010101
31121022112101211
41113310012111
521343114200
62141221421
7366444325
oct127640625
947275354
1023019925
1111aa3235
127861871
1349ccb76
1430b3285
15204aaba
hex15f4195

23019925 has 12 divisors (see below), whose sum is σ = 30047680. Its totient is φ = 17446320.

The previous prime is 23019923. The next prime is 23019947. The reversal of 23019925 is 52991032.

It is not a de Polignac number, because 23019925 - 21 = 23019923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23019923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23757 + ... + 24706.

Almost surely, 223019925 is an apocalyptic number.

23019925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23019925 is a deficient number, since it is larger than the sum of its proper divisors (7027755).

23019925 is a wasteful number, since it uses less digits than its factorization.

23019925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48492 (or 48487 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 23019925 is about 4797.9083984586. The cubic root of 23019925 is about 284.4687960934.

The spelling of 23019925 in words is "twenty-three million, nineteen thousand, nine hundred twenty-five".

Divisors: 1 5 19 25 95 475 48463 242315 920797 1211575 4603985 23019925