18980945263280 has 640 divisors, whose sum is σ = 64383079219200. Its totient is φ = 5006723788800.

The previous prime is 18980945263279. The next prime is 18980945263331. The reversal of 18980945263280 is 8236254908981.

It is a Harshad number since it is a multiple of its sum of digits (65).

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, 46965911 + ... + 47368329.

It is an arithmetic number, because the mean of its divisors is an integer number (100598561280).

Almost surely, 2^{18980945263280} is an apocalyptic number.

18980945263280 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 18980945263280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32191539609600).

18980945263280 is an abundant number, since it is smaller than the sum of its proper divisors (45402133955920).

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

18980945263280 is a wasteful number, since it uses less digits than its factorization.

18980945263280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402513 (or 402507 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 65.

The spelling of 18980945263280 in words is "eighteen trillion, nine hundred eighty billion, nine hundred forty-five million, two hundred sixty-three thousand, two hundred eighty".