20537328346 has 16 divisors (see below), whose sum is σ = 32627471976. Its totient is φ = 9661851136.

The previous prime is 20537328319. The next prime is 20537328359. The reversal of 20537328346 is 64382373502.

It can be written as a sum of positive squares in 4 ways, for example, as 17385741025 + 3151587321 = 131855^2 + 56139^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36030 + ... + 205846.

Almost surely, 2^20537328346 is an apocalyptic number.

20537328346 is a deficient number, since it is larger than the sum of its proper divisors (12090143630).

20537328346 is a wasteful number, since it uses less digits than its factorization.

20537328346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173393.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 20537328346 in words is "twenty billion, five hundred thirty-seven million, three hundred twenty-eight thousand, three hundred forty-six".