20306396250 has 300 divisors, whose sum is σ = 66157693074. Its totient is φ = 4640328000.

The previous prime is 20306396233. The next prime is 20306396263. The reversal of 20306396250 is 5269360302.

20306396250 is a `hidden beast` number, since 20 + 3 + 0 + 6 + 3 + 9 + 625 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 88115769 + 20218280481 = 9387^2 + 142191^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 149 ways as a sum of consecutive naturals, for example, 4959204 + ... + 4963296.

Almost surely, 2^20306396250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20306396250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33078846537).

20306396250 is an abundant number, since it is smaller than the sum of its proper divisors (45851296824).

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

20306396250 is an equidigital number, since it uses as much as digits as its factorization.

20306396250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141 (or 4110 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 20306396250 in words is "twenty billion, three hundred six million, three hundred ninety-six thousand, two hundred fifty".