20615264435 has 16 divisors (see below), whose sum is σ = 25835077440. Its totient is φ = 15762215040.

The previous prime is 20615264393. The next prime is 20615264443. The reversal of 20615264435 is 53446251602.

It is not a de Polignac number, because 20615264435 - 2⁸ = 20615264179 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68405 + ... + 214265.

It is an arithmetic number, because the mean of its divisors is an integer number (1614692340).

Almost surely, 2^20615264435 is an apocalyptic number.

20615264435 is a deficient number, since it is larger than the sum of its proper divisors (5219813005).

20615264435 is a wasteful number, since it uses less digits than its factorization.

20615264435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147118.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 20615264435 in words is "twenty billion, six hundred fifteen million, two hundred sixty-four thousand, four hundred thirty-five".