20225979 has 12 divisors (see below), whose sum is σ = 29277976. Its totient is φ = 13455072.

The previous prime is 20225977. The next prime is 20225987. The reversal of 20225979 is 97952202.

It is not a de Polignac number, because 20225979 - 2¹ = 20225977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20225977) 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, 2559 + ... + 6855.

Almost surely, 2^20225979 is an apocalyptic number.

20225979 is a deficient number, since it is larger than the sum of its proper divisors (9051997).

20225979 is a wasteful number, since it uses less digits than its factorization.

20225979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20225979 is about 4497.3302080234. The cubic root of 20225979 is about 272.4602708401.

It can be divided in two parts, 2022 and 5979, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 20225979 in words is "twenty million, two hundred twenty-five thousand, nine hundred seventy-nine".