17197970920 has 64 divisors (see below), whose sum is σ = 43109010000. Its totient is φ = 6131048448.

The previous prime is 17197970917. The next prime is 17197970957. The reversal of 17197970920 is 2907979171.

It can be written as a sum of positive squares in 8 ways, for example, as 5610309604 + 11587661316 = 74902^2 + 107646^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555145 + ... + 585304.

Almost surely, 2^17197970920 is an apocalyptic number.

17197970920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17197970920 is an abundant number, since it is smaller than the sum of its proper divisors (25911039080).

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

17197970920 is a wasteful number, since it uses less digits than its factorization.

17197970920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140502 (or 1140498 counting only the distinct ones).

The product of its (nonzero) digits is 500094, while the sum is 52.

The spelling of 17197970920 in words is "seventeen billion, one hundred ninety-seven million, nine hundred seventy thousand, nine hundred twenty".