19018044 has 48 divisors (see below), whose sum is σ = 49556640. Its totient is φ = 6307200.

The previous prime is 19018009. The next prime is 19018049. The reversal of 19018044 is 44081091.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 19017999 and 19018017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19018049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31344 + ... + 31944.

It is an arithmetic number, because the mean of its divisors is an integer number (1032430).

Almost surely, 2^19018044 is an apocalyptic number.

It is an amenable number.

19018044 is an abundant number, since it is smaller than the sum of its proper divisors (30538596).

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

19018044 is a wasteful number, since it uses less digits than its factorization.

19018044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 19018044 is about 4360.9682411134. The cubic root of 19018044 is about 266.9246094430.

The spelling of 19018044 in words is "nineteen million, eighteen thousand, forty-four".