19229138 has 4 divisors (see below), whose sum is σ = 28843710. Its totient is φ = 9614568.

The previous prime is 19229137. The next prime is 19229209. The reversal of 19229138 is 83192291.

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., 11539609 + 7689529 = 3397^2 + 2773^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19229098 and 19229107.

It is not an unprimeable number, because it can be changed into a prime (19229137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4807283 + ... + 4807286.

Almost surely, 2^19229138 is an apocalyptic number.

19229138 is a deficient number, since it is larger than the sum of its proper divisors (9614572).

19229138 is an equidigital number, since it uses as much as digits as its factorization.

19229138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614571.

The product of its digits is 7776, while the sum is 35.

The square root of 19229138 is about 4385.1041036673. The cubic root of 19229138 is about 267.9085694647.

The spelling of 19229138 in words is "nineteen million, two hundred twenty-nine thousand, one hundred thirty-eight".