20635560669 has 16 divisors (see below), whose sum is σ = 27791624000. Its totient is φ = 13618838016.

The previous prime is 20635560623. The next prime is 20635560677. The reversal of 20635560669 is 96606553602.

It is not a de Polignac number, because 20635560669 - 2⁷ = 20635560541 is a prime.

It is a super-3 number, since 3×20635560669³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20635560469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74637 + ... + 216429.

It is an arithmetic number, because the mean of its divisors is an integer number (1736976500).

Almost surely, 2^20635560669 is an apocalyptic number.

It is an amenable number.

20635560669 is a deficient number, since it is larger than the sum of its proper divisors (7156063331).

20635560669 is a wasteful number, since it uses less digits than its factorization.

20635560669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142284.

The product of its (nonzero) digits is 1749600, while the sum is 48.

The spelling of 20635560669 in words is "twenty billion, six hundred thirty-five million, five hundred sixty thousand, six hundred sixty-nine".