19409142 has 8 divisors (see below), whose sum is σ = 38818296. Its totient is φ = 6469712.

The previous prime is 19409141. The next prime is 19409153. The reversal of 19409142 is 24190491.

It is a sphenic number, since it is the product of 3 distinct primes.

19409142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19409141) 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 3 ways as a sum of consecutive naturals, for example, 1617423 + ... + 1617434.

It is an arithmetic number, because the mean of its divisors is an integer number (4852287).

Almost surely, 2^19409142 is an apocalyptic number.

19409142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19409142 is a wasteful number, since it uses less digits than its factorization.

19409142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234862.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 19409142 is about 4405.5807789666. The cubic root of 19409142 is about 268.7419386801.

The spelling of 19409142 in words is "nineteen million, four hundred nine thousand, one hundred forty-two".