18748478 has 24 divisors (see below), whose sum is σ = 34439400. Its totient is φ = 7611408.

The previous prime is 18748453. The next prime is 18748487. The reversal of 18748478 is 87484781.

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, 3173 + ... + 6896.

It is an arithmetic number, because the mean of its divisors is an integer number (1434975).

Almost surely, 2^18748478 is an apocalyptic number.

18748478 is a deficient number, since it is larger than the sum of its proper divisors (15690922).

18748478 is a wasteful number, since it uses less digits than its factorization.

18748478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104 (or 10097 counting only the distinct ones).

The product of its digits is 401408, while the sum is 47.

The square root of 18748478 is about 4329.9512699336. The cubic root of 18748478 is about 265.6574538063.

The spelling of 18748478 in words is "eighteen million, seven hundred forty-eight thousand, four hundred seventy-eight".