18730480 has 20 divisors (see below), whose sum is σ = 43548552. Its totient is φ = 7492160.

The previous prime is 18730469. The next prime is 18730489. The reversal of 18730480 is 8403781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116986 + ... + 117145.

Almost surely, 2^18730480 is an apocalyptic number.

18730480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18730480 is an abundant number, since it is smaller than the sum of its proper divisors (24818072).

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

18730480 is a wasteful number, since it uses less digits than its factorization.

18730480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234144 (or 234138 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18730480 is about 4327.8724565310. The cubic root of 18730480 is about 265.5724187501.

The spelling of 18730480 in words is "eighteen million, seven hundred thirty thousand, four hundred eighty".