21562852 has 6 divisors (see below), whose sum is σ = 37734998. Its totient is φ = 10781424.

The previous prime is 21562847. The next prime is 21562859. The reversal of 21562852 is 25826512.

It can be written as a sum of positive squares in only one way, i.e., 21381376 + 181476 = 4624^2 + 426^2 .

It is not an unprimeable number, because it can be changed into a prime (21562859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2695353 + ... + 2695360.

Almost surely, 2^21562852 is an apocalyptic number.

It is an amenable number.

21562852 is a deficient number, since it is larger than the sum of its proper divisors (16172146).

21562852 is a wasteful number, since it uses less digits than its factorization.

21562852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390717 (or 5390715 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 21562852 is about 4643.5818071829. The cubic root of 21562852 is about 278.3355849396.

The spelling of 21562852 in words is "twenty-one million, five hundred sixty-two thousand, eight hundred fifty-two".