19836918444 has 24 divisors (see below), whose sum is σ = 52898449408. Its totient is φ = 5667690960.

The previous prime is 19836918419. The next prime is 19836918487. The reversal of 19836918444 is 44481963891.

It is a super-2 number, since 2×19836918444² (a number of 21 digits) contains 22 as substring.

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, 118076812 + ... + 118076979.

Almost surely, 2^19836918444 is an apocalyptic number.

19836918444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19836918444 is an abundant number, since it is smaller than the sum of its proper divisors (33061530964).

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

19836918444 is a wasteful number, since it uses less digits than its factorization.

19836918444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236153805 (or 236153803 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The spelling of 19836918444 in words is "nineteen billion, eight hundred thirty-six million, nine hundred eighteen thousand, four hundred forty-four".