18920274 has 16 divisors (see below), whose sum is σ = 38035008. Its totient is φ = 6274352.

The previous prime is 18920249. The next prime is 18920281. The reversal of 18920274 is 47202981.

It is a happy 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, 6822 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (2377188).

Almost surely, 2^18920274 is an apocalyptic number.

18920274 is an abundant number, since it is smaller than the sum of its proper divisors (19114734).

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

18920274 is a wasteful number, since it uses less digits than its factorization.

18920274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16209.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18920274 is about 4349.7441304058. The cubic root of 18920274 is about 266.4664118079.

The spelling of 18920274 in words is "eighteen million, nine hundred twenty thousand, two hundred seventy-four".