18914922180 has 864 divisors, whose sum is σ = 79353630720. Its totient is φ = 3592512000.

The previous prime is 18914922167. The next prime is 18914922209. The reversal of 18914922180 is 8122941981.

18914922180 is a `hidden beast` number, since 1 + 89 + 1 + 492 + 2 + 1 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 57144615 + ... + 57144945.

It is an arithmetic number, because the mean of its divisors is an integer number (91844480).

Almost surely, 2^18914922180 is an apocalyptic number.

18914922180 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 18914922180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39676815360).

18914922180 is an abundant number, since it is smaller than the sum of its proper divisors (60438708540).

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

18914922180 is a wasteful number, since it uses less digits than its factorization.

18914922180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 18914922180 in words is "eighteen billion, nine hundred fourteen million, nine hundred twenty-two thousand, one hundred eighty".