20763815822672 has 60 divisors (see below), whose sum is σ = 44265911901876. Its totient is φ = 9379399411200.

The previous prime is 20763815822671. The next prime is 20763815822693. The reversal of 20763815822672 is 27622851836702.

It can be written as a sum of positive squares in 2 ways, for example, as 3693069253696 + 17070746568976 = 1921736^2 + 4131676^2 .

It is a super-2 number, since 2×20763815822672² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20763815822671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22135829 + ... + 23054772.

Almost surely, 2^{20763815822672} is an apocalyptic number.

It is an amenable number.

20763815822672 is an abundant number, since it is smaller than the sum of its proper divisors (23502096079204).

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

20763815822672 is a wasteful number, since it uses less digits than its factorization.

20763815822672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45190716 (or 45190663 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 20763815822672 in words is "twenty trillion, seven hundred sixty-three billion, eight hundred fifteen million, eight hundred twenty-two thousand, six hundred seventy-two".