19149018 has 64 divisors (see below), whose sum is σ = 46835712. Its totient is φ = 5100480.

The previous prime is 19149007. The next prime is 19149023. The reversal of 19149018 is 81094191.

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 19149018.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41308 + ... + 41768.

It is an arithmetic number, because the mean of its divisors is an integer number (731808).

Almost surely, 2^19149018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19149018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23417856).

19149018 is an abundant number, since it is smaller than the sum of its proper divisors (27686694).

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

19149018 is a wasteful number, since it uses less digits than its factorization.

19149018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 19149018 is about 4375.9590948728. The cubic root of 19149018 is about 267.5359627895.

The spelling of 19149018 in words is "nineteen million, one hundred forty-nine thousand, eighteen".