20675922260689 has 12 divisors (see below), whose sum is σ = 21979066380700. Its totient is φ = 19446073452288.

The previous prime is 20675922260663. The next prime is 20675922260731. The reversal of 20675922260689 is 98606222957602.

It can be written as a sum of positive squares in 6 ways, for example, as 482897128464 + 20193025132225 = 694908^2 + 4493665^2 .

It is not a de Polignac number, because 20675922260689 - 2⁹ = 20675922260177 is a prime.

It is a super-2 number, since 2×20675922260689² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20675922260689.

It is not an unprimeable number, because it can be changed into a prime (20675922260629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24619554 + ... + 25445515.

Almost surely, 2^{20675922260689} is an apocalyptic number.

It is an amenable number.

20675922260689 is a deficient number, since it is larger than the sum of its proper divisors (1303144120011).

20675922260689 is a wasteful number, since it uses less digits than its factorization.

20675922260689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50066532 (or 50066515 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 64.

The spelling of 20675922260689 in words is "twenty trillion, six hundred seventy-five billion, nine hundred twenty-two million, two hundred sixty thousand, six hundred eighty-nine".