20555451332 has 96 divisors (see below), whose sum is σ = 41864757984. Its totient is φ = 8745984000.

The previous prime is 20555451331. The next prime is 20555451341. The reversal of 20555451332 is 23315455502.

It can be written as a sum of positive squares in 16 ways, for example, as 11394281536 + 9161169796 = 106744^2 + 95714^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20555451292 and 20555451301.

It is not an unprimeable number, because it can be changed into a prime (20555451331) 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, 15799082 + ... + 15800382.

It is an arithmetic number, because the mean of its divisors is an integer number (436091229).

Almost surely, 2^20555451332 is an apocalyptic number.

It is an amenable number.

20555451332 is an abundant number, since it is smaller than the sum of its proper divisors (21309306652).

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

20555451332 is a wasteful number, since it uses less digits than its factorization.

20555451332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 20555451332 in words is "twenty billion, five hundred fifty-five million, four hundred fifty-one thousand, three hundred thirty-two".