23121892 has 12 divisors (see below), whose sum is σ = 41557180. Its totient is φ = 11248416.

The previous prime is 23121883. The next prime is 23121899. The reversal of 23121892 is 29812132.

It can be written as a sum of positive squares in 2 ways, for example, as 9696996 + 13424896 = 3114^2 + 3664^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23121892.

It is not an unprimeable number, because it can be changed into a prime (23121899) 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 3 ways as a sum of consecutive naturals, for example, 77967 + ... + 78262.

Almost surely, 2^23121892 is an apocalyptic number.

It is an amenable number.

23121892 is a deficient number, since it is larger than the sum of its proper divisors (18435288).

23121892 is a wasteful number, since it uses less digits than its factorization.

23121892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156270 (or 156268 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 23121892 is about 4808.5228501069. The cubic root of 23121892 is about 284.8881966304. Note that the first 3 decimals are identical.

The spelling of 23121892 in words is "twenty-three million, one hundred twenty-one thousand, eight hundred ninety-two".