19216742 has 4 divisors (see below), whose sum is σ = 28825116. Its totient is φ = 9608370.

The previous prime is 19216721. The next prime is 19216777. The reversal of 19216742 is 24761291.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 19216699 and 19216708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4804184 + ... + 4804187.

It is an arithmetic number, because the mean of its divisors is an integer number (7206279).

Almost surely, 2^19216742 is an apocalyptic number.

19216742 is a deficient number, since it is larger than the sum of its proper divisors (9608374).

19216742 is an equidigital number, since it uses as much as digits as its factorization.

19216742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9608373.

The product of its digits is 6048, while the sum is 32.

The square root of 19216742 is about 4383.6904544003. The cubic root of 19216742 is about 267.8509882996.

The spelling of 19216742 in words is "nineteen million, two hundred sixteen thousand, seven hundred forty-two".