20159937566669 has 8 divisors (see below), whose sum is σ = 20652525125568. Its totient is φ = 19667391996640.

The previous prime is 20159937566603. The next prime is 20159937566683. The reversal of 20159937566669 is 96666573995102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20159937566669 - 2²⁰ = 20159936518093 is a prime.

It is a super-2 number, since 2×20159937566669² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20159937566596 and 20159937566605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20159937566269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9524147 + ... + 11446800.

It is an arithmetic number, because the mean of its divisors is an integer number (2581565640696).

Almost surely, 2^{20159937566669} is an apocalyptic number.

It is an amenable number.

20159937566669 is a deficient number, since it is larger than the sum of its proper divisors (492587558899).

20159937566669 is a wasteful number, since it uses less digits than its factorization.

20159937566669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20994435.

The product of its (nonzero) digits is 992023200, while the sum is 74.

The spelling of 20159937566669 in words is "twenty trillion, one hundred fifty-nine billion, nine hundred thirty-seven million, five hundred sixty-six thousand, six hundred sixty-nine".