21445044360 has 32 divisors (see below), whose sum is σ = 64335133440. Its totient is φ = 5718678464.

The previous prime is 21445044353. The next prime is 21445044367. The reversal of 21445044360 is 6344054412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21445044353) and next prime (21445044367).

It is a super-4 number, since 4×21445044360⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21445044367) 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 7 ways as a sum of consecutive naturals, for example, 89354232 + ... + 89354471.

It is an arithmetic number, because the mean of its divisors is an integer number (2010472920).

Almost surely, 2^21445044360 is an apocalyptic number.

21445044360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21445044360 is an abundant number, since it is smaller than the sum of its proper divisors (42890089080).

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

21445044360 is a wasteful number, since it uses less digits than its factorization.

21445044360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178708717 (or 178708713 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 21445044360 its reverse (6344054412), we get a palindrome (27789098772).

The spelling of 21445044360 in words is "twenty-one billion, four hundred forty-five million, forty-four thousand, three hundred sixty".