218974792920 has 128 divisors (see below), whose sum is σ = 708849489600. Its totient is φ = 53795395584.

The previous prime is 218974792913. The next prime is 218974792921. The reversal of 218974792920 is 29297479812.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218974792921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656154 + ... + 931926.

Almost surely, 2^218974792920 is an apocalyptic number.

218974792920 is a gapful number since it is divisible by the number (20) 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 218974792920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354424744800).

218974792920 is an abundant number, since it is smaller than the sum of its proper divisors (489874696680).

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

218974792920 is a wasteful number, since it uses less digits than its factorization.

218974792920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276309 (or 276305 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 218974792920 in words is "two hundred eighteen billion, nine hundred seventy-four million, seven hundred ninety-two thousand, nine hundred twenty".