20720023832 has 16 divisors (see below), whose sum is σ = 38854676400. Its totient is φ = 10358776800.

The previous prime is 20720023801. The next prime is 20720023843. The reversal of 20720023832 is 23832002702.

It is a junction number, because it is equal to n+sod(n) for n = 20720023795 and 20720023804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81044 + ... + 219107.

It is an arithmetic number, because the mean of its divisors is an integer number (2428417275).

Almost surely, 2^20720023832 is an apocalyptic number.

It is an amenable number.

20720023832 is a deficient number, since it is larger than the sum of its proper divisors (18134652568).

20720023832 is a wasteful number, since it uses less digits than its factorization.

20720023832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308786 (or 308782 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 20720023832 in words is "twenty billion, seven hundred twenty million, twenty-three thousand, eight hundred thirty-two".