19718234 has 8 divisors (see below), whose sum is σ = 30019008. Its totient is φ = 9711900.

The previous prime is 19718221. The next prime is 19718261. The reversal of 19718234 is 43281791.

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

It is a junction number, because it is equal to n+sod(n) for n = 19718194 and 19718203.

It is an unprimeable number.

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, 73442 + ... + 73709.

It is an arithmetic number, because the mean of its divisors is an integer number (3752376).

Almost surely, 2^19718234 is an apocalyptic number.

19718234 is a deficient number, since it is larger than the sum of its proper divisors (10300774).

19718234 is a wasteful number, since it uses less digits than its factorization.

19718234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147220.

The product of its digits is 12096, while the sum is 35.

The square root of 19718234 is about 4440.5218161833. The cubic root of 19718234 is about 270.1610105033.

The spelling of 19718234 in words is "nineteen million, seven hundred eighteen thousand, two hundred thirty-four".