20551055570 has 16 divisors (see below), whose sum is σ = 37014862680. Its totient is φ = 8215319424.

The previous prime is 20551055513. The next prime is 20551055573. The reversal of 20551055570 is 7555015502.

It can be written as a sum of positive squares in 4 ways, for example, as 20386985089 + 164070481 = 142783^2 + 12809^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20551055570.

It is not an unprimeable number, because it can be changed into a prime (20551055573) 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, 620915 + ... + 653174.

Almost surely, 2^20551055570 is an apocalyptic number.

20551055570 is a deficient number, since it is larger than the sum of its proper divisors (16463807110).

20551055570 is a wasteful number, since it uses less digits than its factorization.

20551055570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275709.

The product of its (nonzero) digits is 43750, while the sum is 35.

The spelling of 20551055570 in words is "twenty billion, five hundred fifty-one million, fifty-five thousand, five hundred seventy".