20723790828 has 96 divisors (see below), whose sum is σ = 53043621120. Its totient is φ = 6258320640.

The previous prime is 20723790817. The next prime is 20723790847. The reversal of 20723790828 is 82809732702.

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, 7242118 + ... + 7244978.

It is an arithmetic number, because the mean of its divisors is an integer number (552537720).

Almost surely, 2^20723790828 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 20723790828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26521810560).

20723790828 is an abundant number, since it is smaller than the sum of its proper divisors (32319830292).

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

20723790828 is a wasteful number, since it uses less digits than its factorization.

20723790828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727 (or 3725 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 20723790828 in words is "twenty billion, seven hundred twenty-three million, seven hundred ninety thousand, eight hundred twenty-eight".