18972195 has 24 divisors (see below), whose sum is σ = 33369168. Its totient is φ = 9197760.

The previous prime is 18972193. The next prime is 18972199. The reversal of 18972195 is 59127981.

It is not a de Polignac number, because 18972195 - 2¹ = 18972193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18972193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3412 + ... + 7041.

It is an arithmetic number, because the mean of its divisors is an integer number (1390382).

Almost surely, 2^18972195 is an apocalyptic number.

18972195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18972195 is a deficient number, since it is larger than the sum of its proper divisors (14396973).

18972195 is a wasteful number, since it uses less digits than its factorization.

18972195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10483 (or 10472 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 18972195 is about 4355.7083235681. The cubic root of 18972195 is about 266.7099348194.

The spelling of 18972195 in words is "eighteen million, nine hundred seventy-two thousand, one hundred ninety-five".