18310055720 has 128 divisors (see below), whose sum is σ = 45427392000. Its totient is φ = 6586828800.

The previous prime is 18310055681. The next prime is 18310055761. The reversal of 18310055720 is 2755001381.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24060140 + ... + 24060900.

It is an arithmetic number, because the mean of its divisors is an integer number (354901500).

Almost surely, 2^18310055720 is an apocalyptic number.

18310055720 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 18310055720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22713696000).

18310055720 is an abundant number, since it is smaller than the sum of its proper divisors (27117336280).

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

18310055720 is a wasteful number, since it uses less digits than its factorization.

18310055720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 18310055720 in words is "eighteen billion, three hundred ten million, fifty-five thousand, seven hundred twenty".