23236981 has 16 divisors (see below), whose sum is σ = 25171200. Its totient is φ = 21385728.

The previous prime is 23236963. The next prime is 23237003. The reversal of 23236981 is 18963232.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23236981 - 2¹⁷ = 23105909 is a prime.

It is a super-2 number, since 2×23236981² = 1079914571988722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23230981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169545 + ... + 169681.

It is an arithmetic number, because the mean of its divisors is an integer number (1573200).

Almost surely, 2^23236981 is an apocalyptic number.

It is an amenable number.

23236981 is a deficient number, since it is larger than the sum of its proper divisors (1934219).

23236981 is a wasteful number, since it uses less digits than its factorization.

23236981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its digits is 15552, while the sum is 34.

The square root of 23236981 is about 4820.4751840457. The cubic root of 23236981 is about 285.3600906515.

The spelling of 23236981 in words is "twenty-three million, two hundred thirty-six thousand, nine hundred eighty-one".