18912474 has 32 divisors (see below), whose sum is σ = 48032640. Its totient is φ = 5403456.

The previous prime is 18912473. The next prime is 18912497. The reversal of 18912474 is 47421981.

18912474 is a `hidden beast` number, since 189 + 1 + 2 + 474 = 666.

It is not an unprimeable number, because it can be changed into a prime (18912473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24639 + ... + 25394.

It is an arithmetic number, because the mean of its divisors is an integer number (1501020).

Almost surely, 2^18912474 is an apocalyptic number.

18912474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18912474 is an abundant number, since it is smaller than the sum of its proper divisors (29120166).

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

18912474 is a wasteful number, since it uses less digits than its factorization.

18912474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50051 (or 50045 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18912474 is about 4348.8474335161. The cubic root of 18912474 is about 266.4297892993.

The spelling of 18912474 in words is "eighteen million, nine hundred twelve thousand, four hundred seventy-four".