18061270720 has 112 divisors (see below), whose sum is σ = 45447874560. Its totient is φ = 6822706176.

The previous prime is 18061270709. The next prime is 18061270723. The reversal of 18061270720 is 2707216081.

It is a happy number.

It is a super-2 number, since 2×18061270720² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18061270723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565909 + ... + 596971.

Almost surely, 2^18061270720 is an apocalyptic number.

18061270720 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 18061270720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22723937280).

18061270720 is an abundant number, since it is smaller than the sum of its proper divisors (27386603840).

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

18061270720 is a wasteful number, since it uses less digits than its factorization.

18061270720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31182 (or 31172 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The spelling of 18061270720 in words is "eighteen billion, sixty-one million, two hundred seventy thousand, seven hundred twenty".