19979226 has 24 divisors (see below), whose sum is σ = 45171360. Its totient is φ = 6370056.

The previous prime is 19979213. The next prime is 19979227. The reversal of 19979226 is 62297991.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19979227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23716 + ... + 24543.

It is an arithmetic number, because the mean of its divisors is an integer number (1882140).

Almost surely, 2^19979226 is an apocalyptic number.

19979226 is an abundant number, since it is smaller than the sum of its proper divisors (25192134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19979226 is a wasteful number, since it uses less digits than its factorization.

19979226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48290 (or 48287 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 19979226 is about 4469.8127477558. The cubic root of 19979226 is about 271.3477469150.

The spelling of 19979226 in words is "nineteen million, nine hundred seventy-nine thousand, two hundred twenty-six".