20422836 has 36 divisors (see below), whose sum is σ = 59000032. Its totient is φ = 5835024.

The previous prime is 20422819. The next prime is 20422837. The reversal of 20422836 is 63822402.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422837) 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, 40270 + ... + 40773.

Almost surely, 2^20422836 is an apocalyptic number.

It is an amenable number.

20422836 is an abundant number, since it is smaller than the sum of its proper divisors (38577196).

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

20422836 is a wasteful number, since it uses less digits than its factorization.

20422836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81060 (or 81055 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20422836 is about 4519.1631968762. The cubic root of 20422836 is about 273.3413594047.

The spelling of 20422836 in words is "twenty million, four hundred twenty-two thousand, eight hundred thirty-six".