18974380 has 24 divisors (see below), whose sum is σ = 42190848. Its totient is φ = 7143168.

The previous prime is 18974357. The next prime is 18974383. The reversal of 18974380 is 8347981.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18974383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27564 + ... + 28243.

It is an arithmetic number, because the mean of its divisors is an integer number (1757952).

Almost surely, 2^18974380 is an apocalyptic number.

18974380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18974380 is an abundant number, since it is smaller than the sum of its proper divisors (23216468).

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

18974380 is a wasteful number, since it uses less digits than its factorization.

18974380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55833 (or 55831 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 18974380 is about 4355.9591366311. The cubic root of 18974380 is about 266.7201732910.

The spelling of 18974380 in words is "eighteen million, nine hundred seventy-four thousand, three hundred eighty".