22006003640 has 16 divisors (see below), whose sum is σ = 49513508280. Its totient is φ = 8802401440.

The previous prime is 22006003627. The next prime is 22006003693. The reversal of 22006003640 is 4630060022.

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, 275075006 + ... + 275075085.

Almost surely, 2^22006003640 is an apocalyptic number.

22006003640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22006003640 is an abundant number, since it is smaller than the sum of its proper divisors (27507504640).

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

22006003640 is a wasteful number, since it uses less digits than its factorization.

22006003640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550150102 (or 550150098 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 22006003640 its reverse (4630060022), we get a palindrome (26636063662).

The spelling of 22006003640 in words is "twenty-two billion, six million, three thousand, six hundred forty".