20720910311000 has 128 divisors (see below), whose sum is σ = 49837052865600. Its totient is φ = 8057930803200.

The previous prime is 20720910310999. The next prime is 20720910311039. The reversal of 20720910311000 is 11301902702.

It is a super-2 number, since 2×20720910311000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 46360592 + ... + 46805408.

Almost surely, 2^{20720910311000} is an apocalyptic number.

20720910311000 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 20720910311000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24918526432800).

20720910311000 is an abundant number, since it is smaller than the sum of its proper divisors (29116142554600).

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

20720910311000 is a wasteful number, since it uses less digits than its factorization.

20720910311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446134 (or 446120 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The spelling of 20720910311000 in words is "twenty trillion, seven hundred twenty billion, nine hundred ten million, three hundred eleven thousand".