20844523331764 has 48 divisors (see below), whose sum is σ = 43239758284800. Its totient is φ = 8686558562400.

The previous prime is 20844523331729. The next prime is 20844523331833. The reversal of 20844523331764 is 46713332544802.

It is a super-2 number, since 2×20844523331764² (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 15 ways as a sum of consecutive naturals, for example, 402129574 + ... + 402181405.

It is an arithmetic number, because the mean of its divisors is an integer number (900828297600).

Almost surely, 2^{20844523331764} is an apocalyptic number.

It is an amenable number.

20844523331764 is an abundant number, since it is smaller than the sum of its proper divisors (22395234953036).

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

20844523331764 is a wasteful number, since it uses less digits than its factorization.

20844523331764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804311044 (or 804311042 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 52.

The spelling of 20844523331764 in words is "twenty trillion, eight hundred forty-four billion, five hundred twenty-three million, three hundred thirty-one thousand, seven hundred sixty-four".