20689932759 has 8 divisors (see below), whose sum is σ = 27787939440. Its totient is φ = 13692607296.

The previous prime is 20689932733. The next prime is 20689932763. The reversal of 20689932759 is 95723998602.

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

It is not a de Polignac number, because 20689932759 - 2⁹ = 20689932247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20689932779) 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 7 ways as a sum of consecutive naturals, for example, 25169824 + ... + 25170645.

It is an arithmetic number, because the mean of its divisors is an integer number (3473492430).

Almost surely, 2^20689932759 is an apocalyptic number.

20689932759 is a deficient number, since it is larger than the sum of its proper divisors (7098006681).

20689932759 is a wasteful number, since it uses less digits than its factorization.

20689932759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50340609.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 20689932759 in words is "twenty billion, six hundred eighty-nine million, nine hundred thirty-two thousand, seven hundred fifty-nine".