23953855 has 24 divisors (see below), whose sum is σ = 31121280. Its totient is φ = 17660160.

The previous prime is 23953843. The next prime is 23953861. The reversal of 23953855 is 55835932.

It is a de Polignac number, because none of the positive numbers 2^k-23953855 is a prime.

It is a super-2 number, since 2×23953855² = 1147574338722050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328099 + ... + 328171.

It is an arithmetic number, because the mean of its divisors is an integer number (1296720).

Almost surely, 2^23953855 is an apocalyptic number.

23953855 is a deficient number, since it is larger than the sum of its proper divisors (7167425).

23953855 is an equidigital number, since it uses as much as digits as its factorization.

23953855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 138 counting only the distinct ones).

The product of its digits is 162000, while the sum is 40.

The square root of 23953855 is about 4894.2675652236. The cubic root of 23953855 is about 288.2649271009.

The spelling of 23953855 in words is "twenty-three million, nine hundred fifty-three thousand, eight hundred fifty-five".