20877239328 has 144 divisors (see below), whose sum is σ = 61376107968. Its totient is φ = 6206886400.

The previous prime is 20877239221. The next prime is 20877239363. The reversal of 20877239328 is 82393277802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 598693 + ... + 632603.

It is an arithmetic number, because the mean of its divisors is an integer number (426222972).

Almost surely, 2^20877239328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20877239328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30688053984).

20877239328 is an abundant number, since it is smaller than the sum of its proper divisors (40498868640).

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

20877239328 is a wasteful number, since it uses less digits than its factorization.

20877239328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33999 (or 33980 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 20877239328 in words is "twenty billion, eight hundred seventy-seven million, two hundred thirty-nine thousand, three hundred twenty-eight".