19421927118 has 96 divisors (see below), whose sum is σ = 49142725632. Its totient is φ = 5695531200.

The previous prime is 19421927081. The next prime is 19421927123. The reversal of 19421927118 is 81172912491.

It is a super-2 number, since 2×19421927118² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107130 + ... + 224322.

It is an arithmetic number, because the mean of its divisors is an integer number (511903392).

Almost surely, 2^19421927118 is an apocalyptic number.

19421927118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19421927118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24571362816).

19421927118 is an abundant number, since it is smaller than the sum of its proper divisors (29720798514).

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

19421927118 is a wasteful number, since it uses less digits than its factorization.

19421927118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117252 (or 117240 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The spelling of 19421927118 in words is "nineteen billion, four hundred twenty-one million, nine hundred twenty-seven thousand, one hundred eighteen".