18910674 has 12 divisors (see below), whose sum is σ = 40973166. Its totient is φ = 6303552.

The previous prime is 18910673. The next prime is 18910679. The reversal of 18910674 is 47601981.

It can be written as a sum of positive squares in only one way, i.e., 15327225 + 3583449 = 3915^2 + 1893^2 .

It is a super-2 number, since 2×18910674² = 715227182268552, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18910673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 525279 + ... + 525314.

Almost surely, 2^18910674 is an apocalyptic number.

18910674 is an abundant number, since it is smaller than the sum of its proper divisors (22062492).

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

18910674 is a wasteful number, since it uses less digits than its factorization.

18910674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050601 (or 1050598 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18910674 is about 4348.6404772066. The cubic root of 18910674 is about 266.4213365212.

The spelling of 18910674 in words is "eighteen million, nine hundred ten thousand, six hundred seventy-four".