20161388589 has 4 divisors (see below), whose sum is σ = 26881851456. Its totient is φ = 13440925724.

The previous prime is 20161388551. The next prime is 20161388633. The reversal of 20161388589 is 98588316102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20161388589 - 2⁹ = 20161388077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20161388539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3360231429 + ... + 3360231434.

It is an arithmetic number, because the mean of its divisors is an integer number (6720462864).

Almost surely, 2^20161388589 is an apocalyptic number.

It is an amenable number.

20161388589 is a deficient number, since it is larger than the sum of its proper divisors (6720462867).

20161388589 is an equidigital number, since it uses as much as digits as its factorization.

20161388589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720462866.

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 20161388589 in words is "twenty billion, one hundred sixty-one million, three hundred eighty-eight thousand, five hundred eighty-nine".