19018814 has 24 divisors (see below), whose sum is σ = 30212280. Its totient is φ = 8972208.

The previous prime is 19018789. The next prime is 19018817. The reversal of 19018814 is 41881091.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19018817) 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, 136757 + ... + 136895.

It is an arithmetic number, because the mean of its divisors is an integer number (1258845).

Almost surely, 2^19018814 is an apocalyptic number.

19018814 is a deficient number, since it is larger than the sum of its proper divisors (11193466).

19018814 is a wasteful number, since it uses less digits than its factorization.

19018814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 19018814 is about 4361.0565233668. The cubic root of 19018814 is about 266.9282117970.

The spelling of 19018814 in words is "nineteen million, eighteen thousand, eight hundred fourteen".