23642661 has 16 divisors (see below), whose sum is σ = 36253184. Its totient is φ = 13425264.

The previous prime is 23642653. The next prime is 23642681. The reversal of 23642661 is 16624632.

It is not a de Polignac number, because 23642661 - 2³ = 23642653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23642621) 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, 31 + ... + 6876.

It is an arithmetic number, because the mean of its divisors is an integer number (2265824).

Almost surely, 2^23642661 is an apocalyptic number.

23642661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23642661 is a deficient number, since it is larger than the sum of its proper divisors (12610523).

23642661 is a wasteful number, since it uses less digits than its factorization.

23642661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080.

The product of its digits is 10368, while the sum is 30.

The square root of 23642661 is about 4862.3719520415. The cubic root of 23642661 is about 287.0111607229.

The spelling of 23642661 in words is "twenty-three million, six hundred forty-two thousand, six hundred sixty-one".