2018072720 has 160 divisors (see below), whose sum is σ = 5178525696. Its totient is φ = 728064000.

The previous prime is 2018072621. The next prime is 2018072753. The reversal of 2018072720 is 272708102.

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, 6366002 + ... + 6366318.

Almost surely, 2^2018072720 is an apocalyptic number.

2018072720 is a gapful number since it is divisible by the number (20) 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 2018072720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589262848).

2018072720 is an abundant number, since it is smaller than the sum of its proper divisors (3160452976).

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

2018072720 is a wasteful number, since it uses less digits than its factorization.

2018072720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 2018072720 is about 44922.9642833151. The cubic root of 2018072720 is about 1263.7047092347.

The spelling of 2018072720 in words is "two billion, eighteen million, seventy-two thousand, seven hundred twenty".