20695501386681 has 16 divisors (see below), whose sum is σ = 30198721759680. Its totient is φ = 12502655493120.

The previous prime is 20695501386673. The next prime is 20695501386697. The reversal of 20695501386681 is 18668310559602.

It is not a de Polignac number, because 20695501386681 - 2³ = 20695501386673 is a prime.

It is a super-2 number, since 2×20695501386681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20695501386611) 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 15 ways as a sum of consecutive naturals, for example, 1001805016 + ... + 1001825673.

It is an arithmetic number, because the mean of its divisors is an integer number (1887420109980).

Almost surely, 2^{20695501386681} is an apocalyptic number.

It is an amenable number.

20695501386681 is a deficient number, since it is larger than the sum of its proper divisors (9503220372999).

20695501386681 is a wasteful number, since it uses less digits than its factorization.

20695501386681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003631016.

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 20695501386681 in words is "twenty trillion, six hundred ninety-five billion, five hundred one million, three hundred eighty-six thousand, six hundred eighty-one".