22400020644 has 24 divisors (see below), whose sum is σ = 52665701088. Its totient is φ = 7409675520.

The previous prime is 22400020583. The next prime is 22400020651. The reversal of 22400020644 is 44602000422.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7123117 + ... + 7126260.

It is an arithmetic number, because the mean of its divisors is an integer number (2194404212).

Almost surely, 2^22400020644 is an apocalyptic number.

It is an amenable number.

22400020644 is an abundant number, since it is smaller than the sum of its proper divisors (30265680444).

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

22400020644 is a wasteful number, since it uses less digits than its factorization.

22400020644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14249515 (or 14249513 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The spelling of 22400020644 in words is "twenty-two billion, four hundred million, twenty thousand, six hundred forty-four".