20123210992 has 20 divisors (see below), whose sum is σ = 41040759880. Its totient is φ = 9532047168.

The previous prime is 20123210957. The next prime is 20123211019. The reversal of 20123210992 is 29901232102.

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, 33097083 + ... + 33097690.

It is an arithmetic number, because the mean of its divisors is an integer number (2052037994).

Almost surely, 2^20123210992 is an apocalyptic number.

It is an amenable number.

20123210992 is an abundant number, since it is smaller than the sum of its proper divisors (20917548888).

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

20123210992 is a wasteful number, since it uses less digits than its factorization.

20123210992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66194800 (or 66194794 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20123210992 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, nine hundred ninety-two".