20261656211 has 8 divisors (see below), whose sum is σ = 20457178560. Its totient is φ = 20066248168.

The previous prime is 20261656187. The next prime is 20261656223. The reversal of 20261656211 is 11265616202.

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

It is a cyclic number.

It is not a de Polignac number, because 20261656211 - 2³⁰ = 19187914387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20261656231) 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, 351920 + ... + 405426.

It is an arithmetic number, because the mean of its divisors is an integer number (2557147320).

Almost surely, 2^20261656211 is an apocalyptic number.

20261656211 is a deficient number, since it is larger than the sum of its proper divisors (195522349).

20261656211 is a wasteful number, since it uses less digits than its factorization.

20261656211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57153.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 20261656211 in words is "twenty billion, two hundred sixty-one million, six hundred fifty-six thousand, two hundred eleven".