20170969056 has 192 divisors, whose sum is σ = 67768565760. Its totient is φ = 5717537280.

The previous prime is 20170969043. The next prime is 20170969067. The reversal of 20170969056 is 65096907102.

It is a happy number.

It is a super-2 number, since 2×20170969056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 754966 + ... + 781226.

It is an arithmetic number, because the mean of its divisors is an integer number (352961280).

Almost surely, 2^20170969056 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 20170969056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33884282880).

20170969056 is an abundant number, since it is smaller than the sum of its proper divisors (47597596704).

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

20170969056 is a wasteful number, since it uses less digits than its factorization.

20170969056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26414 (or 26400 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 20170969056 in words is "twenty billion, one hundred seventy million, nine hundred sixty-nine thousand, fifty-six".