20689607123 has 8 divisors (see below), whose sum is σ = 20712652800. Its totient is φ = 20666578248.

The previous prime is 20689607093. The next prime is 20689607149. The reversal of 20689607123 is 32170698602.

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 20689607123 - 2⁸ = 20689606867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20689607023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5772590 + ... + 5776172.

It is an arithmetic number, because the mean of its divisors is an integer number (2589081600).

Almost surely, 2^20689607123 is an apocalyptic number.

20689607123 is a deficient number, since it is larger than the sum of its proper divisors (23045677).

20689607123 is a wasteful number, since it uses less digits than its factorization.

20689607123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8401.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 20689607123 in words is "twenty billion, six hundred eighty-nine million, six hundred seven thousand, one hundred twenty-three".