1822420009 has 4 divisors (see below), whose sum is σ = 1929621204. Its totient is φ = 1715218816.

The previous prime is 1822420007. The next prime is 1822420013. The reversal of 1822420009 is 9000242281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 724955625 + 1097464384 = 26925^2 + 33128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1822420009 - 2¹ = 1822420007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1822420007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53600572 + ... + 53600605.

It is an arithmetic number, because the mean of its divisors is an integer number (482405301).

Almost surely, 2^1822420009 is an apocalyptic number.

It is an amenable number.

1822420009 is a deficient number, since it is larger than the sum of its proper divisors (107201195).

1822420009 is a wasteful number, since it uses less digits than its factorization.

1822420009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107201194.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1822420009 is about 42689.8115362436. The cubic root of 1822420009 is about 1221.4700565083.

The spelling of 1822420009 in words is "one billion, eight hundred twenty-two million, four hundred twenty thousand, nine".