18740480 has 90 divisors (see below), whose sum is σ = 49377930. Its totient is φ = 6814720.

The previous prime is 18740473. The next prime is 18740483. The reversal of 18740480 is 8404781.

It can be written as a sum of positive squares in only one way, i.e., 14992384 + 3748096 = 3872^2 + 1936^2 .

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

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1703675 + ... + 1703685.

Almost surely, 2^18740480 is an apocalyptic number.

18740480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18740480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24688965).

18740480 is an abundant number, since it is smaller than the sum of its proper divisors (30637450).

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

18740480 is an frugal number, since it uses more digits than its factorization.

18740480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18740480 is about 4329.0276044396. The cubic root of 18740480 is about 265.6196724191.

The spelling of 18740480 in words is "eighteen million, seven hundred forty thousand, four hundred eighty".