20765357823820 has 24 divisors (see below), whose sum is σ = 43649547546528. Its totient is φ = 8298086726400.

The previous prime is 20765357823701. The next prime is 20765357823823. The reversal of 20765357823820 is 2832875356702.

It is not an unprimeable number, because it can be changed into a prime (20765357823823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503504061 + ... + 503545300.

It is an arithmetic number, because the mean of its divisors is an integer number (1818731147772).

Almost surely, 2^{20765357823820} is an apocalyptic number.

20765357823820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20765357823820 is an abundant number, since it is smaller than the sum of its proper divisors (22884189722708).

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

20765357823820 is a wasteful number, since it uses less digits than its factorization.

20765357823820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007050401 (or 1007050399 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 58.

The spelling of 20765357823820 in words is "twenty trillion, seven hundred sixty-five billion, three hundred fifty-seven million, eight hundred twenty-three thousand, eight hundred twenty".