20372260005656 has 128 divisors (see below), whose sum is σ = 43932380620800. Its totient is φ = 8778109916160.

The previous prime is 20372260005653. The next prime is 20372260005661. The reversal of 20372260005656 is 65650006227302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372260005653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168854105 + ... + 168974711.

It is an arithmetic number, because the mean of its divisors is an integer number (343221723600).

Almost surely, 2^{20372260005656} is an apocalyptic number.

20372260005656 is a gapful number since it is divisible by the number (26) 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 20372260005656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21966190310400).

20372260005656 is an abundant number, since it is smaller than the sum of its proper divisors (23560120615144).

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

20372260005656 is a wasteful number, since it uses less digits than its factorization.

20372260005656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121889 (or 121885 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 20372260005656 in words is "twenty trillion, three hundred seventy-two billion, two hundred sixty million, five thousand, six hundred fifty-six".