20910898911 has 12 divisors (see below), whose sum is σ = 32433231192. Its totient is φ = 11949085008.

The previous prime is 20910898907. The next prime is 20910898927. The reversal of 20910898911 is 11989801902.

It is not a de Polignac number, because 20910898911 - 2² = 20910898907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20910890911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71125360 + ... + 71125653.

It is an arithmetic number, because the mean of its divisors is an integer number (2702769266).

Almost surely, 2^20910898911 is an apocalyptic number.

20910898911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20910898911 is a deficient number, since it is larger than the sum of its proper divisors (11522332281).

20910898911 is a wasteful number, since it uses less digits than its factorization.

20910898911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142251030 (or 142251023 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 48.

The spelling of 20910898911 in words is "twenty billion, nine hundred ten million, eight hundred ninety-eight thousand, nine hundred eleven".