20440705570 has 16 divisors (see below), whose sum is σ = 37487483640. Its totient is φ = 8022012544.

The previous prime is 20440705559. The next prime is 20440705577. The reversal of 20440705570 is 7550704402.

It can be written as a sum of positive squares in 4 ways, for example, as 12457461769 + 7983243801 = 111613^2 + 89349^2 .

It is not an unprimeable number, because it can be changed into a prime (20440705577) 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, 19283155 + ... + 19284214.

Almost surely, 2^20440705570 is an apocalyptic number.

20440705570 is a deficient number, since it is larger than the sum of its proper divisors (17046778070).

20440705570 is a wasteful number, since it uses less digits than its factorization.

20440705570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38567429.

The product of its (nonzero) digits is 39200, while the sum is 34.

The spelling of 20440705570 in words is "twenty billion, four hundred forty million, seven hundred five thousand, five hundred seventy".