20953468912 has 40 divisors (see below), whose sum is σ = 42095083520. Its totient is φ = 10093256640.

The previous prime is 20953468891. The next prime is 20953468937. The reversal of 20953468912 is 21986435902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15889 + ... + 205327.

It is an arithmetic number, because the mean of its divisors is an integer number (1052377088).

Almost surely, 2^20953468912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20953468912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21047541760).

20953468912 is an abundant number, since it is smaller than the sum of its proper divisors (21141614608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20953468912 is a wasteful number, since it uses less digits than its factorization.

20953468912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189701 (or 189695 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 20953468912 in words is "twenty billion, nine hundred fifty-three million, four hundred sixty-eight thousand, nine hundred twelve".