20923806612 has 48 divisors (see below), whose sum is σ = 49951883520. Its totient is φ = 6814324608.

The previous prime is 20923806587. The next prime is 20923806613. The reversal of 20923806612 is 21660832902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20923806613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83178 + ... + 220830.

It is an arithmetic number, because the mean of its divisors is an integer number (1040664240).

Almost surely, 2^20923806612 is an apocalyptic number.

It is an amenable number.

20923806612 is an abundant number, since it is smaller than the sum of its proper divisors (29028076908).

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

20923806612 is a wasteful number, since it uses less digits than its factorization.

20923806612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137952 (or 137950 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 20923806612 in words is "twenty billion, nine hundred twenty-three million, eight hundred six thousand, six hundred twelve".