21468572 has 12 divisors (see below), whose sum is σ = 37602600. Its totient is φ = 10724976.

The previous prime is 21468563. The next prime is 21468581. The reversal of 21468572 is 27586412.

It is an interprime number because it is at equal distance from previous prime (21468563) and next prime (21468581).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7118 + ... + 9674.

It is an arithmetic number, because the mean of its divisors is an integer number (3133550).

Almost surely, 2^21468572 is an apocalyptic number.

It is an amenable number.

21468572 is a deficient number, since it is larger than the sum of its proper divisors (16134028).

21468572 is a wasteful number, since it uses less digits than its factorization.

21468572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660 (or 4658 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 21468572 is about 4633.4190399747. The cubic root of 21468572 is about 277.9293335212.

It can be divided in two parts, 214 and 68572, that added together give a palindrome (68786).

The spelling of 21468572 in words is "twenty-one million, four hundred sixty-eight thousand, five hundred seventy-two".