20538922 has 16 divisors (see below), whose sum is σ = 31763592. Its totient is φ = 9953280.

The previous prime is 20538919. The next prime is 20538923. The reversal of 20538922 is 22983502.

It can be written as a sum of positive squares in 4 ways, for example, as 20061441 + 477481 = 4479^2 + 691^2 .

It is not an unprimeable number, because it can be changed into a prime (20538923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31722 + ... + 32362.

Almost surely, 2^20538922 is an apocalyptic number.

20538922 is a deficient number, since it is larger than the sum of its proper divisors (11224670).

20538922 is a wasteful number, since it uses less digits than its factorization.

20538922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20538922 is about 4531.9887466762. The cubic root of 20538922 is about 273.8582835801.

The spelling of 20538922 in words is "twenty million, five hundred thirty-eight thousand, nine hundred twenty-two".