20440628782 has 16 divisors (see below), whose sum is σ = 36171436032. Its totient is φ = 8477679960.

The previous prime is 20440628779. The next prime is 20440628783. The reversal of 20440628782 is 28782604402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440628783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23548678 + ... + 23549545.

It is an arithmetic number, because the mean of its divisors is an integer number (2260714752).

Almost surely, 2^20440628782 is an apocalyptic number.

20440628782 is a deficient number, since it is larger than the sum of its proper divisors (15730807250).

20440628782 is a wasteful number, since it uses less digits than its factorization.

20440628782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47098263.

The product of its (nonzero) digits is 344064, while the sum is 43.

The spelling of 20440628782 in words is "twenty billion, four hundred forty million, six hundred twenty-eight thousand, seven hundred eighty-two".