20397814763236 has 27 divisors (see below), whose sum is σ = 36103185884731. Its totient is φ = 10083915473984.

The previous prime is 20397814763093. The next prime is 20397814763309. The reversal of 20397814763236 is 63236741879302.

It is a happy number.

The square root of 20397814763236 is 4516394.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14801486452900 + 5596328310336 = 3847270^2 + 2365656^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 803905446 + ... + 803930818.

Almost surely, 2^{20397814763236} is an apocalyptic number.

20397814763236 is the 4516394-th square number.

It is an amenable number.

20397814763236 is a deficient number, since it is larger than the sum of its proper divisors (15705371121495).

20397814763236 is an frugal number, since it uses more digits than its factorization.

20397814763236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50928 (or 25464 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 61.

The spelling of 20397814763236 in words is "twenty trillion, three hundred ninety-seven billion, eight hundred fourteen million, seven hundred sixty-three thousand, two hundred thirty-six".