18872154 has 36 divisors (see below), whose sum is σ = 47567754. Its totient is φ = 5391792.

The previous prime is 18872143. The next prime is 18872173. The reversal of 18872154 is 45127881.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 8277129 = 3255^2 + 2877^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9817 + ... + 11580.

Almost surely, 2^18872154 is an apocalyptic number.

18872154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18872154 is an abundant number, since it is smaller than the sum of its proper divisors (28695600).

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

18872154 is a wasteful number, since it uses less digits than its factorization.

18872154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21419 (or 21409 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 18872154 is about 4344.2092491039. The cubic root of 18872154 is about 266.2403183678.

The spelling of 18872154 in words is "eighteen million, eight hundred seventy-two thousand, one hundred fifty-four".