18474780 has 48 divisors (see below), whose sum is σ = 51932160. Its totient is φ = 4907328.

The previous prime is 18474779. The next prime is 18474787. The reversal of 18474780 is 8747481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21601 + ... + 22439.

It is an arithmetic number, because the mean of its divisors is an integer number (1081920).

Almost surely, 2^18474780 is an apocalyptic number.

18474780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18474780 is an abundant number, since it is smaller than the sum of its proper divisors (33457380).

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

18474780 is a wasteful number, since it uses less digits than its factorization.

18474780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 18474780 is about 4298.2298682132. The cubic root of 18474780 is about 264.3583860816.

The spelling of 18474780 in words is "eighteen million, four hundred seventy-four thousand, seven hundred eighty".