19213442 has 4 divisors (see below), whose sum is σ = 28820166. Its totient is φ = 9606720.

The previous prime is 19213429. The next prime is 19213489. The reversal of 19213442 is 24431291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16394401 + 2819041 = 4049^2 + 1679^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4803359 + ... + 4803362.

Almost surely, 2^19213442 is an apocalyptic number.

19213442 is a deficient number, since it is larger than the sum of its proper divisors (9606724).

19213442 is an equidigital number, since it uses as much as digits as its factorization.

19213442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9606723.

The product of its digits is 1728, while the sum is 26.

The square root of 19213442 is about 4383.3140430501. The cubic root of 19213442 is about 267.8356551618.

The spelling of 19213442 in words is "nineteen million, two hundred thirteen thousand, four hundred forty-two".