20564980935 has 36 divisors (see below), whose sum is σ = 33507423144. Its totient is φ = 10770413760.

The previous prime is 20564980913. The next prime is 20564980957. The reversal of 20564980935 is 53908946502.

It is an interprime number because it is at equal distance from previous prime (20564980913) and next prime (20564980957).

It is not a de Polignac number, because 20564980935 - 2¹⁷ = 20564849863 is a prime.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 33879402 + ... + 33880008.

It is an arithmetic number, because the mean of its divisors is an integer number (930761754).

Almost surely, 2^20564980935 is an apocalyptic number.

20564980935 is a deficient number, since it is larger than the sum of its proper divisors (12942442209).

20564980935 is an frugal number, since it uses more digits than its factorization.

20564980935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 20564980935 in words is "twenty billion, five hundred sixty-four million, nine hundred eighty thousand, nine hundred thirty-five".