19149156 has 96 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 5626368.

The previous prime is 19149149. The next prime is 19149161. The reversal of 19149156 is 65194191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19149156.

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, 31996 + ... + 32588.

It is an arithmetic number, because the mean of its divisors is an integer number (582120).

Almost surely, 2^19149156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19149156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27941760).

19149156 is an abundant number, since it is smaller than the sum of its proper divisors (36734364).

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

19149156 is a wasteful number, since it uses less digits than its factorization.

19149156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 634 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 19149156 is about 4375.9748628163. The cubic root of 19149156 is about 267.5366054660.

The spelling of 19149156 in words is "nineteen million, one hundred forty-nine thousand, one hundred fifty-six".