20864880311 has 16 divisors (see below), whose sum is σ = 23484764160. Its totient is φ = 18374572320.

The previous prime is 20864880269. The next prime is 20864880313. The reversal of 20864880311 is 11308846802.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20864880311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864880313) 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, 180455 + ... + 272568.

It is an arithmetic number, because the mean of its divisors is an integer number (1467797760).

Almost surely, 2^20864880311 is an apocalyptic number.

20864880311 is a deficient number, since it is larger than the sum of its proper divisors (2619883849).

20864880311 is a wasteful number, since it uses less digits than its factorization.

20864880311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453166.

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 20864880311 in words is "twenty billion, eight hundred sixty-four million, eight hundred eighty thousand, three hundred eleven".