20321108730 has 96 divisors (see below), whose sum is σ = 57832079760. Its totient is φ = 4920099840.

The previous prime is 20321108701. The next prime is 20321108737. The reversal of 20321108730 is 3780112302.

It can be written as a sum of positive squares in 8 ways, for example, as 22553001 + 20298555729 = 4749^2 + 142473^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20321108694 and 20321108703.

It is not an unprimeable number, because it can be changed into a prime (20321108737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70995 + ... + 213734.

Almost surely, 2^20321108730 is an apocalyptic number.

20321108730 is an abundant number, since it is smaller than the sum of its proper divisors (37510971030).

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

20321108730 is a wasteful number, since it uses less digits than its factorization.

20321108730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284816 (or 284813 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The spelling of 20321108730 in words is "twenty billion, three hundred twenty-one million, one hundred eight thousand, seven hundred thirty".