19149340 has 96 divisors (see below), whose sum is σ = 50641920. Its totient is φ = 5930496.

The previous prime is 19149323. The next prime is 19149341. The reversal of 19149340 is 4394191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19149341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61024 + ... + 61336.

It is an arithmetic number, because the mean of its divisors is an integer number (527520).

Almost surely, 2^19149340 is an apocalyptic number.

19149340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19149340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25320960).

19149340 is an abundant number, since it is smaller than the sum of its proper divisors (31492580).

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

19149340 is a wasteful number, since it uses less digits than its factorization.

19149340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 19149340 is about 4375.9958866525. The cubic root of 19149340 is about 267.5374623633.

The spelling of 19149340 in words is "nineteen million, one hundred forty-nine thousand, three hundred forty".