18490736 has 30 divisors (see below), whose sum is σ = 39382896. Its totient is φ = 8404000.

The previous prime is 18490733. The next prime is 18490757. The reversal of 18490736 is 63709481.

It is a self number, because there is not a number n which added to its sum of digits gives 18490736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490733) 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, 2840 + ... + 6711.

Almost surely, 2^18490736 is an apocalyptic number.

18490736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18490736 is an abundant number, since it is smaller than the sum of its proper divisors (20892160).

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

18490736 is a wasteful number, since it uses less digits than its factorization.

18490736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581 (or 9564 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 18490736 is about 4300.0855805437. The cubic root of 18490736 is about 264.4344697778.

The spelling of 18490736 in words is "eighteen million, four hundred ninety thousand, seven hundred thirty-six".