20864481339 has 16 divisors (see below), whose sum is σ = 30143063552. Its totient is φ = 12760905888.

The previous prime is 20864481311. The next prime is 20864481377. The reversal of 20864481339 is 93318446802.

It is not a de Polignac number, because 20864481339 - 2¹⁵ = 20864448571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20864481389) 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, 1634707 + ... + 1647420.

It is an arithmetic number, because the mean of its divisors is an integer number (1883941472).

Almost surely, 2^20864481339 is an apocalyptic number.

20864481339 is a deficient number, since it is larger than the sum of its proper divisors (9278582213).

20864481339 is a wasteful number, since it uses less digits than its factorization.

20864481339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282306.

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 20864481339 in words is "twenty billion, eight hundred sixty-four million, four hundred eighty-one thousand, three hundred thirty-nine".