20923909632 has 280 divisors, whose sum is σ = 63778648560. Its totient is φ = 6852833280.

The previous prime is 20923909613. The next prime is 20923909639. The reversal of 20923909632 is 23690932902.

20923909632 is a `hidden beast` number, since 2 + 0 + 9 + 2 + 3 + 9 + 0 + 9 + 632 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923909639) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 22767669 + ... + 22768587.

Almost surely, 2^20923909632 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 20923909632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31889324280).

20923909632 is an abundant number, since it is smaller than the sum of its proper divisors (42854738928).

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

20923909632 is an frugal number, since it uses more digits than its factorization.

20923909632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The spelling of 20923909632 in words is "twenty billion, nine hundred twenty-three million, nine hundred nine thousand, six hundred thirty-two".