20505183692 has 48 divisors (see below), whose sum is σ = 43547515200. Its totient is φ = 8247232512.

The previous prime is 20505183689. The next prime is 20505183701. The reversal of 20505183692 is 29638150502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104408 + ... + 227840.

It is an arithmetic number, because the mean of its divisors is an integer number (907239900).

Almost surely, 2^20505183692 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 20505183692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21773757600).

20505183692 is an abundant number, since it is smaller than the sum of its proper divisors (23042331508).

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

20505183692 is a wasteful number, since it uses less digits than its factorization.

20505183692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123810 (or 123808 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 20505183692 in words is "twenty billion, five hundred five million, one hundred eighty-three thousand, six hundred ninety-two".