20075979 has 32 divisors (see below), whose sum is σ = 33606144. Its totient is φ = 10356480.

The previous prime is 20075971. The next prime is 20075981. The reversal of 20075979 is 97957002.

It is not a de Polignac number, because 20075979 - 2³ = 20075971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20075971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53637 + ... + 54009.

It is an arithmetic number, because the mean of its divisors is an integer number (1050192).

Almost surely, 2^20075979 is an apocalyptic number.

20075979 is a deficient number, since it is larger than the sum of its proper divisors (13530165).

20075979 is a wasteful number, since it uses less digits than its factorization.

20075979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 20075979 is about 4480.6226129858. The cubic root of 20075979 is about 271.7850585301.

The spelling of 20075979 in words is "twenty million, seventy-five thousand, nine hundred seventy-nine".