20321311250 has 120 divisors (see below), whose sum is σ = 41162414436. Its totient is φ = 7495680000.

The previous prime is 20321311249. The next prime is 20321311277. The reversal of 20321311250 is 5211312302.

It can be written as a sum of positive squares in 30 ways, for example, as 17587799161 + 2733512089 = 132619^2 + 52283^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 79071122 + ... + 79071378.

Almost surely, 2^20321311250 is an apocalyptic number.

20321311250 is an abundant number, since it is smaller than the sum of its proper divisors (20841103186).

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

20321311250 is an equidigital number, since it uses as much as digits as its factorization.

20321311250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20321311250 its reverse (5211312302), we get a palindrome (25532623552).

The spelling of 20321311250 in words is "twenty billion, three hundred twenty-one million, three hundred eleven thousand, two hundred fifty".