20220538 has 16 divisors (see below), whose sum is σ = 32739336. Its totient is φ = 9311040.

The previous prime is 20220517. The next prime is 20220581. The reversal of 20220538 is 83502202.

It can be written as a sum of positive squares in 4 ways, for example, as 19509889 + 710649 = 4417^2 + 843^2 .

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, 18528 + ... + 19588.

Almost surely, 2^20220538 is an apocalyptic number.

20220538 is a deficient number, since it is larger than the sum of its proper divisors (12518798).

20220538 is a wasteful number, since it uses less digits than its factorization.

20220538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20220538 is about 4496.7252528924. The cubic root of 20220538 is about 272.4358370944.

The spelling of 20220538 in words is "twenty million, two hundred twenty thousand, five hundred thirty-eight".