20729145288 has 32 divisors (see below), whose sum is σ = 51935304960. Its totient is φ = 6894722880.

The previous prime is 20729145263. The next prime is 20729145289. The reversal of 20729145288 is 88254192702.

It is not an unprimeable number, because it can be changed into a prime (20729145289) 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, 925720 + ... + 947847.

It is an arithmetic number, because the mean of its divisors is an integer number (1622978280).

Almost surely, 2^20729145288 is an apocalyptic number.

It is an amenable number.

20729145288 is an abundant number, since it is smaller than the sum of its proper divisors (31206159672).

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

20729145288 is a wasteful number, since it uses less digits than its factorization.

20729145288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874037 (or 1874033 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 20729145288 in words is "twenty billion, seven hundred twenty-nine million, one hundred forty-five thousand, two hundred eighty-eight".