22446643000 has 64 divisors (see below), whose sum is σ = 54808902720. Its totient is φ = 8588272000.

The previous prime is 22446642991. The next prime is 22446643001. The reversal of 22446643000 is 34664422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22446643001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464971 + ... + 510970.

It is an arithmetic number, because the mean of its divisors is an integer number (856389105).

Almost surely, 2^22446643000 is an apocalyptic number.

22446643000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22446643000 is an abundant number, since it is smaller than the sum of its proper divisors (32362259720).

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

22446643000 is a wasteful number, since it uses less digits than its factorization.

22446643000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975985 (or 975971 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

The spelling of 22446643000 in words is "twenty-two billion, four hundred forty-six million, six hundred forty-three thousand".