19992243558 has 32 divisors (see below), whose sum is σ = 45706784256. Its totient is φ = 5710791168.

The previous prime is 19992243553. The next prime is 19992243587. The reversal of 19992243558 is 85534229991.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19992243498 and 19992243507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19992243553) 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, 145335 + ... + 247197.

It is an arithmetic number, because the mean of its divisors is an integer number (1428337008).

Almost surely, 2^19992243558 is an apocalyptic number.

19992243558 is an abundant number, since it is smaller than the sum of its proper divisors (25714540698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19992243558 is a wasteful number, since it uses less digits than its factorization.

19992243558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106548.

The product of its digits is 6998400, while the sum is 57.

The spelling of 19992243558 in words is "nineteen billion, nine hundred ninety-two million, two hundred forty-three thousand, five hundred fifty-eight".