20015247274736 has 80 divisors (see below), whose sum is σ = 44577960161280. Its totient is φ = 8527962942720.

The previous prime is 20015247274723. The next prime is 20015247274751. The reversal of 20015247274736 is 63747274251002.

It is a happy number.

It is a super-2 number, since 2×20015247274736² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66890225 + ... + 67188783.

It is an arithmetic number, because the mean of its divisors is an integer number (557224502016).

Almost surely, 2^{20015247274736} 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 20015247274736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22288980080640).

20015247274736 is an abundant number, since it is smaller than the sum of its proper divisors (24562712886544).

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

20015247274736 is a wasteful number, since it uses less digits than its factorization.

20015247274736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302062 (or 302056 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 50.

The spelling of 20015247274736 in words is "twenty trillion, fifteen billion, two hundred forty-seven million, two hundred seventy-four thousand, seven hundred thirty-six".