20247274728 has 64 divisors (see below), whose sum is σ = 56509108800. Its totient is φ = 6717090240.

The previous prime is 20247274699. The next prime is 20247274753. The reversal of 20247274728 is 82747274202.

It is a super-2 number, since 2×20247274728² (a number of 21 digits) contains 22 as substring.

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, 176551 + ... + 267702.

It is an arithmetic number, because the mean of its divisors is an integer number (882954825).

Almost surely, 2^20247274728 is an apocalyptic number.

It is an amenable number.

20247274728 is an abundant number, since it is smaller than the sum of its proper divisors (36261834072).

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

20247274728 is a wasteful number, since it uses less digits than its factorization.

20247274728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444479 (or 444469 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 45.

The spelling of 20247274728 in words is "twenty billion, two hundred forty-seven million, two hundred seventy-four thousand, seven hundred twenty-eight".