18974278080 has 224 divisors, whose sum is σ = 67746067200. Its totient is φ = 4998657024.

The previous prime is 18974278073. The next prime is 18974278087. The reversal of 18974278080 is 8087247981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18974278073) and next prime (18974278087).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974278087) 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, 703891 + ... + 730349.

It is an arithmetic number, because the mean of its divisors is an integer number (302437800).

Almost surely, 2^18974278080 is an apocalyptic number.

18974278080 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 18974278080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33873033600).

18974278080 is an abundant number, since it is smaller than the sum of its proper divisors (48771789120).

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

18974278080 is a wasteful number, since it uses less digits than its factorization.

18974278080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26568 (or 26552 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 18974278080 in words is "eighteen billion, nine hundred seventy-four million, two hundred seventy-eight thousand, eighty".