23981956 has 18 divisors (see below), whose sum is σ = 43471610. Its totient is φ = 11575872.

The previous prime is 23981953. The next prime is 23981959. The reversal of 23981956 is 65918932.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23981953) and next prime (23981959).

It can be written as a sum of positive squares in 3 ways, for example, as 5198400 + 18783556 = 2280^2 + 4334^2 .

It is not an unprimeable number, because it can be changed into a prime (23981953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201 + ... + 6928.

Almost surely, 2^23981956 is an apocalyptic number.

It is an amenable number.

23981956 is a deficient number, since it is larger than the sum of its proper divisors (19489654).

23981956 is a wasteful number, since it uses less digits than its factorization.

23981956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191 (or 7160 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 23981956 is about 4897.1375312523. The cubic root of 23981956 is about 288.3776071841.

The spelling of 23981956 in words is "twenty-three million, nine hundred eighty-one thousand, nine hundred fifty-six".