18319805880 has 256 divisors, whose sum is σ = 60569026560. Its totient is φ = 4412620800.

The previous prime is 18319805869. The next prime is 18319805891. The reversal of 18319805880 is 8850891381.

It is an interprime number because it is at equal distance from previous prime (18319805869) and next prime (18319805891).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8030340 + ... + 8032620.

It is an arithmetic number, because the mean of its divisors is an integer number (236597760).

Almost surely, 2^18319805880 is an apocalyptic number.

18319805880 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 18319805880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30284513280).

18319805880 is an abundant number, since it is smaller than the sum of its proper divisors (42249220680).

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

18319805880 is a wasteful number, since it uses less digits than its factorization.

18319805880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 18319805880 in words is "eighteen billion, three hundred nineteen million, eight hundred five thousand, eight hundred eighty".