18413780 has 72 divisors (see below), whose sum is σ = 48620544. Its totient is φ = 5734080.

The previous prime is 18413767. The next prime is 18413789. The reversal of 18413780 is 8731481.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16397 + ... + 17483.

Almost surely, 2^18413780 is an apocalyptic number.

18413780 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 18413780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24310272).

18413780 is an abundant number, since it is smaller than the sum of its proper divisors (30206764).

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

18413780 is a wasteful number, since it uses less digits than its factorization.

18413780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18413780 is about 4291.1280568168. The cubic root of 18413780 is about 264.0671125672.

The spelling of 18413780 in words is "eighteen million, four hundred thirteen thousand, seven hundred eighty".