20440628752 has 20 divisors (see below), whose sum is σ = 39616321536. Its totient is φ = 10217061920.

The previous prime is 20440628729. The next prime is 20440628753. The reversal of 20440628752 is 25782604402.

It is not an unprimeable number, because it can be changed into a prime (20440628753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151024 + ... + 252367.

Almost surely, 2^20440628752 is an apocalyptic number.

It is an amenable number.

20440628752 is a deficient number, since it is larger than the sum of its proper divisors (19175692784).

20440628752 is a wasteful number, since it uses less digits than its factorization.

20440628752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406566 (or 406560 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 20440628752 in words is "twenty billion, four hundred forty million, six hundred twenty-eight thousand, seven hundred fifty-two".