20744179056 has 280 divisors, whose sum is σ = 62853236064. Its totient is φ = 6623285760.

The previous prime is 20744179039. The next prime is 20744179061. The reversal of 20744179056 is 65097144702.

It is a super-2 number, since 2×20744179056² (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 55 ways as a sum of consecutive naturals, for example, 30640990 + ... + 30641666.

Almost surely, 2^20744179056 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 20744179056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31426618032).

20744179056 is an abundant number, since it is smaller than the sum of its proper divisors (42109057008).

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

20744179056 is an equidigital number, since it uses as much as digits as its factorization.

20744179056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 20744179056 in words is "twenty billion, seven hundred forty-four million, one hundred seventy-nine thousand, fifty-six".