19081944 has 48 divisors (see below), whose sum is σ = 59064720. Its totient is φ = 5451840.

The previous prime is 19081943. The next prime is 19081963. The reversal of 19081944 is 44918091.

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 = 19081899 and 19081908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19081943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18427 + ... + 19434.

It is an arithmetic number, because the mean of its divisors is an integer number (1230515).

Almost surely, 2^19081944 is an apocalyptic number.

19081944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19081944 is an abundant number, since it is smaller than the sum of its proper divisors (39982776).

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

19081944 is a wasteful number, since it uses less digits than its factorization.

19081944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37880 (or 37873 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 19081944 is about 4368.2884520141. The cubic root of 19081944 is about 267.2232278683.

The spelling of 19081944 in words is "nineteen million, eighty-one thousand, nine hundred forty-four".