20017037979 has 16 divisors (see below), whose sum is σ = 29659516800. Its totient is φ = 13342601448.

The previous prime is 20017037951. The next prime is 20017038007. The reversal of 20017037979 is 97973071002.

20017037979 is a `hidden beast` number, since 200 + 1 + 7 + 0 + 379 + 79 = 666.

It is an interprime number because it is at equal distance from previous prime (20017037951) and next prime (20017038007).

It is not a de Polignac number, because 20017037979 - 2¹⁷ = 20016906907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20017037279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128352 + ... + 237714.

It is an arithmetic number, because the mean of its divisors is an integer number (1853719800).

Almost surely, 2^20017037979 is an apocalyptic number.

20017037979 is a deficient number, since it is larger than the sum of its proper divisors (9642478821).

20017037979 is a wasteful number, since it uses less digits than its factorization.

20017037979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116151 (or 116145 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The spelling of 20017037979 in words is "twenty billion, seventeen million, thirty-seven thousand, nine hundred seventy-nine".