21677468 has 24 divisors (see below), whose sum is σ = 38623200. Its totient is φ = 10644480.

The previous prime is 21677443. The next prime is 21677501. The reversal of 21677468 is 86477612.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89828 + ... + 90068.

It is an arithmetic number, because the mean of its divisors is an integer number (1609300).

Almost surely, 2^21677468 is an apocalyptic number.

It is an amenable number.

21677468 is a deficient number, since it is larger than the sum of its proper divisors (16945732).

21677468 is a wasteful number, since it uses less digits than its factorization.

21677468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 555 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 21677468 is about 4655.9067860085. The cubic root of 21677468 is about 278.8278722288.

The spelling of 21677468 in words is "twenty-one million, six hundred seventy-seven thousand, four hundred sixty-eight".