20945953392 has 160 divisors (see below), whose sum is σ = 68222300160. Its totient is φ = 5389424640.

The previous prime is 20945953367. The next prime is 20945953423. The reversal of 20945953392 is 29335954902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120609 + ... + 237567.

It is an arithmetic number, because the mean of its divisors is an integer number (426389376).

Almost surely, 2^20945953392 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 20945953392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34111150080).

20945953392 is an abundant number, since it is smaller than the sum of its proper divisors (47276346768).

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

20945953392 is a wasteful number, since it uses less digits than its factorization.

20945953392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117031 (or 117025 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 51.

The spelling of 20945953392 in words is "twenty billion, nine hundred forty-five million, nine hundred fifty-three thousand, three hundred ninety-two".