20620013265 has 40 divisors (see below), whose sum is σ = 36977581608. Its totient is φ = 10993086720.

The previous prime is 20620013251. The next prime is 20620013357. The reversal of 20620013265 is 56231002602.

20620013265 is a `hidden beast` number, since 2 + 0 + 620 + 0 + 1 + 32 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3218973696 + 17401039569 = 56736^2 + 131913^2 .

It is not a de Polignac number, because 20620013265 - 2⁷ = 20620013137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1231389 + ... + 1248021.

Almost surely, 2^20620013265 is an apocalyptic number.

It is an amenable number.

20620013265 is a deficient number, since it is larger than the sum of its proper divisors (16357568343).

20620013265 is a wasteful number, since it uses less digits than its factorization.

20620013265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19711 (or 19702 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 20620013265 its reverse (56231002602), we get a palindrome (76851015867).

The spelling of 20620013265 in words is "twenty billion, six hundred twenty million, thirteen thousand, two hundred sixty-five".