20696516577 has 128 divisors (see below), whose sum is σ = 35951984640. Its totient is φ = 11648448000.

The previous prime is 20696516573. The next prime is 20696516597. The reversal of 20696516577 is 77561569602.

20696516577 is a `hidden beast` number, since 2 + 0 + 6 + 9 + 65 + 1 + 6 + 577 = 666.

It is not a de Polignac number, because 20696516577 - 2² = 20696516573 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20696516573) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 24149533 + ... + 24150389.

It is an arithmetic number, because the mean of its divisors is an integer number (280874880).

Almost surely, 2^20696516577 is an apocalyptic number.

20696516577 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20696516577 is a deficient number, since it is larger than the sum of its proper divisors (15255468063).

20696516577 is a wasteful number, since it uses less digits than its factorization.

20696516577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The spelling of 20696516577 in words is "twenty billion, six hundred ninety-six million, five hundred sixteen thousand, five hundred seventy-seven".