21242233344 has 40 divisors (see below), whose sum is σ = 56590641360. Its totient is φ = 7080743936.

The previous prime is 21242233333. The next prime is 21242233357. The reversal of 21242233344 is 44333224212.

It is a nude number because it is divisible by every one of its digits.

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, 6913254 + ... + 6916325.

It is an arithmetic number, because the mean of its divisors is an integer number (1414766034).

Almost surely, 2^21242233344 is an apocalyptic number.

21242233344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21242233344 is an abundant number, since it is smaller than the sum of its proper divisors (35348408016).

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

21242233344 is an equidigital number, since it uses as much as digits as its factorization.

21242233344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13829600 (or 13829584 counting only the distinct ones).

The product of its digits is 27648, while the sum is 30.

Adding to 21242233344 its reverse (44333224212), we get a palindrome (65575457556).

The spelling of 21242233344 in words is "twenty-one billion, two hundred forty-two million, two hundred thirty-three thousand, three hundred forty-four".