19919229080 has 32 divisors (see below), whose sum is σ = 44839969200. Its totient is φ = 7963833216.

The previous prime is 19919229067. The next prime is 19919229157. The reversal of 19919229080 is 8092291991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36215 + ... + 202854.

Almost surely, 2^19919229080 is an apocalyptic number.

19919229080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19919229080 is an abundant number, since it is smaller than the sum of its proper divisors (24920740120).

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

19919229080 is a wasteful number, since it uses less digits than its factorization.

19919229080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241163 (or 241159 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 50.

It can be divided in two parts, 1991922 and 9080, that added together give a palindrome (2001002).

The spelling of 19919229080 in words is "nineteen billion, nine hundred nineteen million, two hundred twenty-nine thousand, eighty".