18957997080 has 512 divisors, whose sum is σ = 74151936000. Its totient is φ = 4258967040.

The previous prime is 18957997031. The next prime is 18957997103. The reversal of 18957997080 is 8079975981.

It is a junction number, because it is equal to n+sod(n) for n = 18957996999 and 18957997017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10607947 + ... + 10609733.

It is an arithmetic number, because the mean of its divisors is an integer number (144828000).

Almost surely, 2^18957997080 is an apocalyptic number.

18957997080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18957997080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37075968000).

18957997080 is an abundant number, since it is smaller than the sum of its proper divisors (55193938920).

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

18957997080 is a wasteful number, since it uses less digits than its factorization.

18957997080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884 (or 1874 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 63.

The spelling of 18957997080 in words is "eighteen billion, nine hundred fifty-seven million, nine hundred ninety-seven thousand, eighty".