20309868968 has 16 divisors (see below), whose sum is σ = 40085268000. Its totient is φ = 9620464176.

The previous prime is 20309868967. The next prime is 20309868973. The reversal of 20309868968 is 86986890302.

It is not an unprimeable number, because it can be changed into a prime (20309868967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66808628 + ... + 66808931.

It is an arithmetic number, because the mean of its divisors is an integer number (2505329250).

Almost surely, 2^20309868968 is an apocalyptic number.

It is an amenable number.

20309868968 is a deficient number, since it is larger than the sum of its proper divisors (19775399032).

20309868968 is a wasteful number, since it uses less digits than its factorization.

20309868968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133617584 (or 133617580 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 20309868968 in words is "twenty billion, three hundred nine million, eight hundred sixty-eight thousand, nine hundred sixty-eight".