20695165944959 has 64 divisors (see below), whose sum is σ = 24406483852800. Its totient is φ = 17344598169600.

The previous prime is 20695165944923. The next prime is 20695165944991. The reversal of 20695165944959 is 95944956159602.

It is a cyclic number.

It is not a de Polignac number, because 20695165944959 - 2⁸ = 20695165944703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20695165940959) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7041565712 + ... + 7041568650.

It is an arithmetic number, because the mean of its divisors is an integer number (381351310200).

Almost surely, 2^{20695165944959} is an apocalyptic number.

20695165944959 is a deficient number, since it is larger than the sum of its proper divisors (3711317907841).

20695165944959 is a wasteful number, since it uses less digits than its factorization.

20695165944959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824.

The product of its (nonzero) digits is 944784000, while the sum is 74.

The spelling of 20695165944959 in words is "twenty trillion, six hundred ninety-five billion, one hundred sixty-five million, nine hundred forty-four thousand, nine hundred fifty-nine".