19117944 has 80 divisors (see below), whose sum is σ = 54174120. Its totient is φ = 6298560.

The previous prime is 19117927. The next prime is 19117951. The reversal of 19117944 is 44971191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19117899 and 19117908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105534 + ... + 105714.

Almost surely, 2^19117944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19117944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27087060).

19117944 is an abundant number, since it is smaller than the sum of its proper divisors (35056176).

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

19117944 is a wasteful number, since it uses less digits than its factorization.

19117944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 349 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 19117944 is about 4372.4071173668. The cubic root of 19117944 is about 267.3911701005.

The spelling of 19117944 in words is "nineteen million, one hundred seventeen thousand, nine hundred forty-four".