18875394 has 12 divisors (see below), whose sum is σ = 40896726. Its totient is φ = 6291792.

The previous prime is 18875393. The next prime is 18875399. The reversal of 18875394 is 49357881.

It can be written as a sum of positive squares in only one way, i.e., 18378369 + 497025 = 4287^2 + 705^2 .

It is not an unprimeable number, because it can be changed into a prime (18875393) 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, 524299 + ... + 524334.

Almost surely, 2^18875394 is an apocalyptic number.

18875394 is an abundant number, since it is smaller than the sum of its proper divisors (22021332).

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

18875394 is a wasteful number, since it uses less digits than its factorization.

18875394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048641 (or 1048638 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18875394 is about 4344.5821433137. The cubic root of 18875394 is about 266.2555536764.

The spelling of 18875394 in words is "eighteen million, eight hundred seventy-five thousand, three hundred ninety-four".