20812288739 has 8 divisors (see below), whose sum is σ = 22843607232. Its totient is φ = 18804185640.

The previous prime is 20812288711. The next prime is 20812288751. The reversal of 20812288739 is 93788221802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20812288739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20812288789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5801969 + ... + 5805554.

It is an arithmetic number, because the mean of its divisors is an integer number (2855450904).

Almost surely, 2^20812288739 is an apocalyptic number.

20812288739 is a deficient number, since it is larger than the sum of its proper divisors (2031318493).

20812288739 is a wasteful number, since it uses less digits than its factorization.

20812288739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11607697.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 20812288739 in words is "twenty billion, eight hundred twelve million, two hundred eighty-eight thousand, seven hundred thirty-nine".