18074740 has 24 divisors (see below), whose sum is σ = 40190472. Its totient is φ = 6804480.

The previous prime is 18074737. The next prime is 18074783. The reversal of 18074740 is 4747081.

It can be written as a sum of positive squares in 4 ways, for example, as 5071504 + 13003236 = 2252^2 + 3606^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26241 + ... + 26920.

It is an arithmetic number, because the mean of its divisors is an integer number (1674603).

Almost surely, 2^18074740 is an apocalyptic number.

18074740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18074740 is an abundant number, since it is smaller than the sum of its proper divisors (22115732).

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

18074740 is a wasteful number, since it uses less digits than its factorization.

18074740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53187 (or 53185 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 18074740 is about 4251.4397561297. The cubic root of 18074740 is about 262.4363685524.

The spelling of 18074740 in words is "eighteen million, seventy-four thousand, seven hundred forty".