18748386 has 12 divisors (see below), whose sum is σ = 40621542. Its totient is φ = 6249456.

The previous prime is 18748363. The next prime is 18748391. The reversal of 18748386 is 68384781.

It can be written as a sum of positive squares in only one way, i.e., 16966161 + 1782225 = 4119^2 + 1335^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 520771 + ... + 520806.

Almost surely, 2^18748386 is an apocalyptic number.

18748386 is an abundant number, since it is smaller than the sum of its proper divisors (21873156).

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

18748386 is a wasteful number, since it uses less digits than its factorization.

18748386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041585 (or 1041582 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 18748386 is about 4329.9406462445. The cubic root of 18748386 is about 265.6570192728.

The spelling of 18748386 in words is "eighteen million, seven hundred forty-eight thousand, three hundred eighty-six".