19974226 has 4 divisors (see below), whose sum is σ = 29961342. Its totient is φ = 9987112.

The previous prime is 19974223. The next prime is 19974233. The reversal of 19974226 is 62247991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62247991 = 13 ⋅4788307.

It can be written as a sum of positive squares in only one way, i.e., 19793601 + 180625 = 4449^2 + 425^2 .

It is a super-3 number, since 3×19974226³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (19974221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993555 + ... + 4993558.

Almost surely, 2^19974226 is an apocalyptic number.

19974226 is a deficient number, since it is larger than the sum of its proper divisors (9987116).

19974226 is an equidigital number, since it uses as much as digits as its factorization.

19974226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987115.

The product of its digits is 54432, while the sum is 40.

The square root of 19974226 is about 4469.2534052121. The cubic root of 19974226 is about 271.3251092024.

The spelling of 19974226 in words is "nineteen million, nine hundred seventy-four thousand, two hundred twenty-six".