19942915589 has 4 divisors (see below), whose sum is σ = 19946983020. Its totient is φ = 19938848160.

The previous prime is 19942915511. The next prime is 19942915609. The reversal of 19942915589 is 98551924991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11558400100 + 8384515489 = 107510^2 + 91567^2 .

It is a cyclic number.

It is not a de Polignac number, because 19942915589 - 2¹² = 19942911493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19942905589) 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, 2026352 + ... + 2036169.

It is an arithmetic number, because the mean of its divisors is an integer number (4986745755).

Almost surely, 2^19942915589 is an apocalyptic number.

It is an amenable number.

19942915589 is a deficient number, since it is larger than the sum of its proper divisors (4067431).

19942915589 is an equidigital number, since it uses as much as digits as its factorization.

19942915589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067430.

The product of its digits is 10497600, while the sum is 62.

The spelling of 19942915589 in words is "nineteen billion, nine hundred forty-two million, nine hundred fifteen thousand, five hundred eighty-nine".