21579052 has 36 divisors (see below), whose sum is σ = 43788024. Its totient is φ = 9226240.

The previous prime is 21579049. The next prime is 21579053. The reversal of 21579052 is 25097512.

It is not an unprimeable number, because it can be changed into a prime (21579053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11868 + ... + 13564.

It is an arithmetic number, because the mean of its divisors is an integer number (1216334).

Almost surely, 2^21579052 is an apocalyptic number.

21579052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21579052 is an abundant number, since it is smaller than the sum of its proper divisors (22208972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21579052 is a wasteful number, since it uses less digits than its factorization.

21579052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1727 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 21579052 is about 4645.3258228030. The cubic root of 21579052 is about 278.4052712647.

The spelling of 21579052 in words is "twenty-one million, five hundred seventy-nine thousand, fifty-two".