17972708920 has 32 divisors (see below), whose sum is σ = 40534686720. Its totient is φ = 7172000640.

The previous prime is 17972708909. The next prime is 17972708947. The reversal of 17972708920 is 2980727971.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516792 + ... + 550471.

It is an arithmetic number, because the mean of its divisors is an integer number (1266708960).

Almost surely, 2^17972708920 is an apocalyptic number.

17972708920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17972708920 is an abundant number, since it is smaller than the sum of its proper divisors (22561977800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17972708920 is a wasteful number, since it uses less digits than its factorization.

17972708920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067695 (or 1067691 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 52.

The spelling of 17972708920 in words is "seventeen billion, nine hundred seventy-two million, seven hundred eight thousand, nine hundred twenty".