17983520988 has 48 divisors (see below), whose sum is σ = 42583968000. Its totient is φ = 5905715200.

The previous prime is 17983520969. The next prime is 17983521013. The reversal of 17983520988 is 88902538971.

It is a super-2 number, since 2×17983520988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 1270108 + ... + 1284188.

It is an arithmetic number, because the mean of its divisors is an integer number (887166000).

Almost surely, 2^17983520988 is an apocalyptic number.

It is an amenable number.

17983520988 is an abundant number, since it is smaller than the sum of its proper divisors (24600447012).

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

17983520988 is a wasteful number, since it uses less digits than its factorization.

17983520988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15658 (or 15656 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 17983520988 in words is "seventeen billion, nine hundred eighty-three million, five hundred twenty thousand, nine hundred eighty-eight".