20431179 has 6 divisors (see below), whose sum is σ = 29511716. Its totient is φ = 13620780.

The previous prime is 20431171. The next prime is 20431211. The reversal of 20431179 is 97113402.

It is not a de Polignac number, because 20431179 - 2³ = 20431171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431171) 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 5 ways as a sum of consecutive naturals, for example, 1135057 + ... + 1135074.

Almost surely, 2^20431179 is an apocalyptic number.

20431179 is a deficient number, since it is larger than the sum of its proper divisors (9080537).

20431179 is a wasteful number, since it uses less digits than its factorization.

20431179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270137 (or 2270134 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20431179 is about 4520.0861717450. The cubic root of 20431179 is about 273.3785755305.

The spelling of 20431179 in words is "twenty million, four hundred thirty-one thousand, one hundred seventy-nine".