18485004400 has 60 divisors (see below), whose sum is σ = 47022606432. Its totient is φ = 6959057920.

The previous prime is 18485004397. The next prime is 18485004407. The reversal of 18485004400 is 440058481.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18485004407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1352392 + ... + 1365991.

Almost surely, 2^18485004400 is an apocalyptic number.

18485004400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18485004400 is an abundant number, since it is smaller than the sum of its proper divisors (28537602032).

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

18485004400 is a wasteful number, since it uses less digits than its factorization.

18485004400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718418 (or 2718407 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The spelling of 18485004400 in words is "eighteen billion, four hundred eighty-five million, four thousand, four hundred".