20172936959 has 12 divisors (see below), whose sum is σ = 23621893488. Its totient is φ = 17176572000.

The previous prime is 20172936941. The next prime is 20172937003. The reversal of 20172936959 is 95963927102.

It is not a de Polignac number, because 20172936959 - 2³² = 15877969663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20172936959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20172936929) 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, 1355822 + ... + 1370619.

It is an arithmetic number, because the mean of its divisors is an integer number (1968491124).

Almost surely, 2^20172936959 is an apocalyptic number.

20172936959 is a deficient number, since it is larger than the sum of its proper divisors (3448956529).

20172936959 is a wasteful number, since it uses less digits than its factorization.

20172936959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726606 (or 2726599 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 20172936959 in words is "twenty billion, one hundred seventy-two million, nine hundred thirty-six thousand, nine hundred fifty-nine".