22440204391 has 48 divisors (see below), whose sum is σ = 28241353728. Its totient is φ = 17601235200.

The previous prime is 22440204389. The next prime is 22440204469. The reversal of 22440204391 is 19340204422.

It is not a de Polignac number, because 22440204391 - 2¹ = 22440204389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440204791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2087356 + ... + 2098078.

It is an arithmetic number, because the mean of its divisors is an integer number (588361536).

Almost surely, 2^22440204391 is an apocalyptic number.

22440204391 is a deficient number, since it is larger than the sum of its proper divisors (5801149337).

22440204391 is a wasteful number, since it uses less digits than its factorization.

22440204391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10820 (or 10801 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 22440204391 its sum of digits (31), we get a palindrome (22440204422).

The spelling of 22440204391 in words is "twenty-two billion, four hundred forty million, two hundred four thousand, three hundred ninety-one".