23769921 has 16 divisors (see below), whose sum is σ = 36993024. Its totient is φ = 13293264.

The previous prime is 23769919. The next prime is 23769929. The reversal of 23769921 is 12996732.

It is not a de Polignac number, because 23769921 - 2¹ = 23769919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23769921.

It is not an unprimeable number, because it can be changed into a prime (23769929) 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, 11055 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (2312064).

Almost surely, 2^23769921 is an apocalyptic number.

23769921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23769921 is a deficient number, since it is larger than the sum of its proper divisors (13223103).

23769921 is a wasteful number, since it uses less digits than its factorization.

23769921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24140.

The product of its digits is 40824, while the sum is 39.

The square root of 23769921 is about 4875.4405954744. The cubic root of 23769921 is about 287.5251990515.

The spelling of 23769921 in words is "twenty-three million, seven hundred sixty-nine thousand, nine hundred twenty-one".