18972150 has 24 divisors (see below), whose sum is σ = 47051304. Its totient is φ = 5059200.

The previous prime is 18972137. The next prime is 18972169. The reversal of 18972150 is 5127981.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63091 + ... + 63390.

It is an arithmetic number, because the mean of its divisors is an integer number (1960471).

Almost surely, 2^18972150 is an apocalyptic number.

18972150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18972150 is an abundant number, since it is smaller than the sum of its proper divisors (28079154).

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

18972150 is a wasteful number, since it uses less digits than its factorization.

18972150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126496 (or 126491 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 18972150 is about 4355.7031579298. The cubic root of 18972150 is about 266.7097239502.

The spelling of 18972150 in words is "eighteen million, nine hundred seventy-two thousand, one hundred fifty".