23487681 has 16 divisors (see below), whose sum is σ = 35869568. Its totient is φ = 13392000.

The previous prime is 23487679. The next prime is 23487683. The reversal of 23487681 is 18678432.

It is an interprime number because it is at equal distance from previous prime (23487679) and next prime (23487683).

It is not a de Polignac number, because 23487681 - 2¹ = 23487679 is a prime.

It is a super-2 number, since 2×23487681² = 1103342317515522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23487683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11691 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (2241848).

Almost surely, 2^23487681 is an apocalyptic number.

23487681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23487681 is a deficient number, since it is larger than the sum of its proper divisors (12381887).

23487681 is a wasteful number, since it uses less digits than its factorization.

23487681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its digits is 64512, while the sum is 39.

The square root of 23487681 is about 4846.4090830222. The cubic root of 23487681 is about 286.3826564888.

Subtracting from 23487681 its reverse (18678432), we obtain a square (4809249 = 2193²).

The spelling of 23487681 in words is "twenty-three million, four hundred eighty-seven thousand, six hundred eighty-one".