18980609280 has 288 divisors, whose sum is σ = 62910591744. Its totient is φ = 4873125888.

The previous prime is 18980609279. The next prime is 18980609311. The reversal of 18980609280 is 8290608981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14633592 + ... + 14634888.

Almost surely, 2^18980609280 is an apocalyptic number.

18980609280 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 18980609280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31455295872).

18980609280 is an abundant number, since it is smaller than the sum of its proper divisors (43929982464).

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

18980609280 is a wasteful number, since it uses less digits than its factorization.

18980609280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461 (or 1447 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The spelling of 18980609280 in words is "eighteen billion, nine hundred eighty million, six hundred nine thousand, two hundred eighty".