21376364 has 12 divisors (see below), whose sum is σ = 38698800. Its totient is φ = 10319568.

The previous prime is 21376357. The next prime is 21376403. The reversal of 21376364 is 46367312.

It is a self number, because there is not a number n which added to its sum of digits gives 21376364.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92024 + ... + 92255.

It is an arithmetic number, because the mean of its divisors is an integer number (3224900).

Almost surely, 2^21376364 is an apocalyptic number.

It is an amenable number.

21376364 is a deficient number, since it is larger than the sum of its proper divisors (17322436).

21376364 is a wasteful number, since it uses less digits than its factorization.

21376364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184312 (or 184310 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 21376364 is about 4623.4580132191. The cubic root of 21376364 is about 277.5308582409.

The spelling of 21376364 in words is "twenty-one million, three hundred seventy-six thousand, three hundred sixty-four".