19874418 has 16 divisors (see below), whose sum is σ = 41841120. Its totient is φ = 6276096.

The previous prime is 19874401. The next prime is 19874419. The reversal of 19874418 is 81447891.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19874418.

It is not an unprimeable number, because it can be changed into a prime (19874419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87055 + ... + 87282.

It is an arithmetic number, because the mean of its divisors is an integer number (2615070).

Almost surely, 2^19874418 is an apocalyptic number.

19874418 is an abundant number, since it is smaller than the sum of its proper divisors (21966702).

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

19874418 is a wasteful number, since it uses less digits than its factorization.

19874418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174361.

The product of its digits is 64512, while the sum is 42.

The square root of 19874418 is about 4458.0733506752. The cubic root of 19874418 is about 270.8724317097.

The spelling of 19874418 in words is "nineteen million, eight hundred seventy-four thousand, four hundred eighteen".