20711121952000 has 72 divisors (see below), whose sum is σ = 51593993752392. Its totient is φ = 8284448768000.

The previous prime is 20711121951991. The next prime is 20711121952043. The reversal of 20711121952000 is 25912111702.

It can be written as a sum of positive squares in 4 ways, for example, as 1310127473664 + 19400994478336 = 1144608^2 + 4404656^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323579281 + ... + 323643280.

It is an arithmetic number, because the mean of its divisors is an integer number (716583246561).

Almost surely, 2^{20711121952000} is an apocalyptic number.

20711121952000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20711121952000 is an abundant number, since it is smaller than the sum of its proper divisors (30882871800392).

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

20711121952000 is an frugal number, since it uses more digits than its factorization.

20711121952000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647222592 (or 647222568 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 20711121952000 in words is "twenty trillion, seven hundred eleven billion, one hundred twenty-one million, nine hundred fifty-two thousand".