21024052 has 24 divisors (see below), whose sum is σ = 42151424. Its totient is φ = 8988192.

The previous prime is 21023971. The next prime is 21024067. The reversal of 21024052 is 25042012.

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, 16378 + ... + 17614.

Almost surely, 2^21024052 is an apocalyptic number.

It is an amenable number.

21024052 is an abundant number, since it is smaller than the sum of its proper divisors (21127372).

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

21024052 is a wasteful number, since it uses less digits than its factorization.

21024052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 21024052 is about 4585.1992323126. The cubic root of 21024052 is about 275.9977070453.

Adding to 21024052 its reverse (25042012), we get a palindrome (46066064).

The spelling of 21024052 in words is "twenty-one million, twenty-four thousand, fifty-two".