22436544640 has 32 divisors (see below), whose sum is σ = 53637366060. Its totient is φ = 8974617600.

The previous prime is 22436544587. The next prime is 22436544653. The reversal of 22436544640 is 4644563422.

It can be written as a sum of positive squares in 2 ways, for example, as 22363407936 + 73136704 = 149544^2 + 8552^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 22436544593 and 22436544602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17527911 + ... + 17529190.

Almost surely, 2^22436544640 is an apocalyptic number.

22436544640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22436544640 is an abundant number, since it is smaller than the sum of its proper divisors (31200821420).

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

22436544640 is an equidigital number, since it uses as much as digits as its factorization.

22436544640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35057120 (or 35057108 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 22436544640 in words is "twenty-two billion, four hundred thirty-six million, five hundred forty-four thousand, six hundred forty".