20307234702768 has 80 divisors (see below), whose sum is σ = 56496448266720. Its totient is φ = 6248304709632.

The previous prime is 20307234702763. The next prime is 20307234702779. The reversal of 20307234702768 is 86720743270302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20307234702768.

It is not an unprimeable number, because it can be changed into a prime (20307234702763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74514978 + ... + 74787006.

It is an arithmetic number, because the mean of its divisors is an integer number (706205603334).

Almost surely, 2^{20307234702768} is an apocalyptic number.

It is an amenable number.

20307234702768 is an abundant number, since it is smaller than the sum of its proper divisors (36189213563952).

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

20307234702768 is a wasteful number, since it uses less digits than its factorization.

20307234702768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391686 (or 391680 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 51.

The spelling of 20307234702768 in words is "twenty trillion, three hundred seven billion, two hundred thirty-four million, seven hundred two thousand, seven hundred sixty-eight".