18739040 has 24 divisors (see below), whose sum is σ = 44271360. Its totient is φ = 7495552.

The previous prime is 18739031. The next prime is 18739067. The reversal of 18739040 is 4093781.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 18738988 and 18739006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58400 + ... + 58719.

It is an arithmetic number, because the mean of its divisors is an integer number (1844640).

Almost surely, 2^18739040 is an apocalyptic number.

18739040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18739040 is an abundant number, since it is smaller than the sum of its proper divisors (25532320).

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

18739040 is a wasteful number, since it uses less digits than its factorization.

18739040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117134 (or 117126 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18739040 is about 4328.8612821388. The cubic root of 18739040 is about 265.6128689270.

The spelling of 18739040 in words is "eighteen million, seven hundred thirty-nine thousand, forty".