19742194 has 4 divisors (see below), whose sum is σ = 29613294. Its totient is φ = 9871096.

The previous prime is 19742183. The next prime is 19742207. The reversal of 19742194 is 49124791.

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., 19686969 + 55225 = 4437^2 + 235^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935547 + ... + 4935550.

Almost surely, 2^19742194 is an apocalyptic number.

19742194 is a deficient number, since it is larger than the sum of its proper divisors (9871100).

19742194 is an equidigital number, since it uses as much as digits as its factorization.

19742194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871099.

The product of its digits is 18144, while the sum is 37.

The square root of 19742194 is about 4443.2188782458. The cubic root of 19742194 is about 270.2703921335.

The spelling of 19742194 in words is "nineteen million, seven hundred forty-two thousand, one hundred ninety-four".