21264602 has 8 divisors (see below), whose sum is σ = 32018976. Its totient is φ = 10591612.

The previous prime is 21264601. The next prime is 21264613. The reversal of 21264602 is 20646212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21264601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19688 + ... + 20739.

It is an arithmetic number, because the mean of its divisors is an integer number (4002372).

Almost surely, 2^21264602 is an apocalyptic number.

21264602 is a deficient number, since it is larger than the sum of its proper divisors (10754374).

21264602 is a wasteful number, since it uses less digits than its factorization.

21264602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40692.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21264602 is about 4611.3557659326. The cubic root of 21264602 is about 277.0463415193.

The spelling of 21264602 in words is "twenty-one million, two hundred sixty-four thousand, six hundred two".