18667480 has 32 divisors (see below), whose sum is σ = 45234000. Its totient is φ = 6892416.

The previous prime is 18667471. The next prime is 18667489. The reversal of 18667480 is 8476681.

18667480 = 190² + 191² + ... + 397².

It is an interprime number because it is at equal distance from previous prime (18667471) and next prime (18667489).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18667489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17430 + ... + 18469.

Almost surely, 2^18667480 is an apocalyptic number.

18667480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18667480 is an abundant number, since it is smaller than the sum of its proper divisors (26566520).

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

18667480 is a wasteful number, since it uses less digits than its factorization.

18667480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35923 (or 35919 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 18667480 is about 4320.5879229568. The cubic root of 18667480 is about 265.2743332084.

The spelling of 18667480 in words is "eighteen million, six hundred sixty-seven thousand, four hundred eighty".