20896221311 has 16 divisors (see below), whose sum is σ = 24217365504. Its totient is φ = 17659249344.

The previous prime is 20896221271. The next prime is 20896221317. The reversal of 20896221311 is 11312269802.

It is a cyclic number.

It is not a de Polignac number, because 20896221311 - 2³⁰ = 19822479487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20896221317) 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, 1845710 + ... + 1856996.

It is an arithmetic number, because the mean of its divisors is an integer number (1513585344).

Almost surely, 2^20896221311 is an apocalyptic number.

20896221311 is a deficient number, since it is larger than the sum of its proper divisors (3321144193).

20896221311 is a wasteful number, since it uses less digits than its factorization.

20896221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14990.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 20896221311 in words is "twenty billion, eight hundred ninety-six million, two hundred twenty-one thousand, three hundred eleven".