18671874 has 16 divisors (see below), whose sum is σ = 40216512. Its totient is φ = 5745168.

The previous prime is 18671833. The next prime is 18671879. The reversal of 18671874 is 47817681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18671879) 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, 119614 + ... + 119769.

It is an arithmetic number, because the mean of its divisors is an integer number (2513532).

Almost surely, 2^18671874 is an apocalyptic number.

18671874 is an abundant number, since it is smaller than the sum of its proper divisors (21544638).

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

18671874 is a wasteful number, since it uses less digits than its factorization.

18671874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239401.

The product of its digits is 75264, while the sum is 42.

The square root of 18671874 is about 4321.0963886495. The cubic root of 18671874 is about 265.2951452298.

It can be divided in two parts, 1867 and 1874, that added together give a triangular number (3741 = T₈₆).

The spelling of 18671874 in words is "eighteen million, six hundred seventy-one thousand, eight hundred seventy-four".