19812122 has 8 divisors (see below), whose sum is σ = 32419872. Its totient is φ = 9005500.

The previous prime is 19812113. The next prime is 19812179. The reversal of 19812122 is 22121891.

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 = 19812091 and 19812100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450254 + ... + 450297.

It is an arithmetic number, because the mean of its divisors is an integer number (4052484).

Almost surely, 2^19812122 is an apocalyptic number.

19812122 is a deficient number, since it is larger than the sum of its proper divisors (12607750).

19812122 is a wasteful number, since it uses less digits than its factorization.

19812122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900564.

The product of its digits is 576, while the sum is 26.

The square root of 19812122 is about 4451.0809922984. The cubic root of 19812122 is about 270.5891205965.

The spelling of 19812122 in words is "nineteen million, eight hundred twelve thousand, one hundred twenty-two".