18780468 has 24 divisors (see below), whose sum is σ = 50081472. Its totient is φ = 5365824.

The previous prime is 18780431. The next prime is 18780473. The reversal of 18780468 is 86408781.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 111705 + ... + 111872.

It is an arithmetic number, because the mean of its divisors is an integer number (2086728).

Almost surely, 2^18780468 is an apocalyptic number.

It is an amenable number.

18780468 is an abundant number, since it is smaller than the sum of its proper divisors (31301004).

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

18780468 is a wasteful number, since it uses less digits than its factorization.

18780468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223591 (or 223589 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18780468 is about 4333.6437324727. The cubic root of 18780468 is about 265.8084625621.

The spelling of 18780468 in words is "eighteen million, seven hundred eighty thousand, four hundred sixty-eight".