23667621 has 16 divisors (see below), whose sum is σ = 34867584. Its totient is φ = 14203904.

The previous prime is 23667617. The next prime is 23667629. The reversal of 23667621 is 12676632.

It is a cyclic number.

It is not a de Polignac number, because 23667621 - 2² = 23667617 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23667629) 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, 8916 + ... + 11261.

It is an arithmetic number, because the mean of its divisors is an integer number (2179224).

Almost surely, 2^23667621 is an apocalyptic number.

It is an amenable number.

23667621 is a deficient number, since it is larger than the sum of its proper divisors (11199963).

23667621 is a wasteful number, since it uses less digits than its factorization.

23667621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220.

The product of its digits is 18144, while the sum is 33.

The square root of 23667621 is about 4864.9379235505. The cubic root of 23667621 is about 287.1121262200.

The spelling of 23667621 in words is "twenty-three million, six hundred sixty-seven thousand, six hundred twenty-one".