19218044 has 12 divisors (see below), whose sum is σ = 35401800. Its totient is φ = 9103248.

The previous prime is 19218029. The next prime is 19218077. The reversal of 19218044 is 44081291.

It is a junction number, because it is equal to n+sod(n) for n = 19217998 and 19218016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126359 + ... + 126510.

It is an arithmetic number, because the mean of its divisors is an integer number (2950150).

Almost surely, 2^19218044 is an apocalyptic number.

It is an amenable number.

19218044 is a deficient number, since it is larger than the sum of its proper divisors (16183756).

19218044 is a wasteful number, since it uses less digits than its factorization.

19218044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252892 (or 252890 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 19218044 is about 4383.8389568961. The cubic root of 19218044 is about 267.8570374366.

The spelling of 19218044 in words is "nineteen million, two hundred eighteen thousand, forty-four".