20317473172 has 24 divisors (see below), whose sum is σ = 35918426880. Its totient is φ = 10055576160.

The previous prime is 20317473157. The next prime is 20317473181. The reversal of 20317473172 is 27137471302.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 96022 + ... + 223282.

It is an arithmetic number, because the mean of its divisors is an integer number (1496601120).

Almost surely, 2^20317473172 is an apocalyptic number.

It is an amenable number.

20317473172 is a deficient number, since it is larger than the sum of its proper divisors (15600953708).

20317473172 is a wasteful number, since it uses less digits than its factorization.

20317473172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127671 (or 127669 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The spelling of 20317473172 in words is "twenty billion, three hundred seventeen million, four hundred seventy-three thousand, one hundred seventy-two".