20831472609822 has 288 divisors, whose sum is σ = 56341561672800. Its totient is φ = 5681878659072.

The previous prime is 20831472609791. The next prime is 20831472609877. The reversal of 20831472609822 is 22890627413802.

20831472609822 is a `hidden beast` number, since 2 + 0 + 8 + 3 + 1 + 4 + 7 + 2 + 609 + 8 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 607792878 + ... + 607827150.

It is an arithmetic number, because the mean of its divisors is an integer number (195630422475).

Almost surely, 2^{20831472609822} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20831472609822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28170780836400).

20831472609822 is an abundant number, since it is smaller than the sum of its proper divisors (35510089062978).

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

20831472609822 is a wasteful number, since it uses less digits than its factorization.

20831472609822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34505 (or 34403 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 20831472609822 in words is "twenty trillion, eight hundred thirty-one billion, four hundred seventy-two million, six hundred nine thousand, eight hundred twenty-two".