19800022 has 8 divisors (see below), whose sum is σ = 32400072. Its totient is φ = 9000000.

The previous prime is 19799993. The next prime is 19800083. The reversal of 19800022 is 22000891.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 900001 = 19800022 / (1 + 9 + 8 + 0 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 19799966 and 19800002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449979 + ... + 450022.

It is an arithmetic number, because the mean of its divisors is an integer number (4050009).

Almost surely, 2^19800022 is an apocalyptic number.

19800022 is a deficient number, since it is larger than the sum of its proper divisors (12600050).

19800022 is a wasteful number, since it uses less digits than its factorization.

19800022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900014.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 19800022 is about 4449.7215643229. The cubic root of 19800022 is about 270.5340230972.

The spelling of 19800022 in words is "nineteen million, eight hundred thousand, twenty-two".