18400654080 has 216 divisors, whose sum is σ = 64170742272. Its totient is φ = 4867817472.

The previous prime is 18400654079. The next prime is 18400654091. The reversal of 18400654080 is 8045600481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1456752 + ... + 1469328.

Almost surely, 2^18400654080 is an apocalyptic number.

18400654080 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 18400654080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32085371136).

18400654080 is an abundant number, since it is smaller than the sum of its proper divisors (45770088192).

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

18400654080 is a wasteful number, since it uses less digits than its factorization.

18400654080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731 (or 12714 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 18400654080 in words is "eighteen billion, four hundred million, six hundred fifty-four thousand, eighty".