21232450344 has 64 divisors (see below), whose sum is σ = 60678259200. Its totient is φ = 6065002944.

The previous prime is 21232450331. The next prime is 21232450367. The reversal of 21232450344 is 44305423212.

It is a super-2 number, since 2×21232450344² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866047 + ... + 890225.

It is an arithmetic number, because the mean of its divisors is an integer number (948097800).

Almost surely, 2^21232450344 is an apocalyptic number.

21232450344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21232450344 is an abundant number, since it is smaller than the sum of its proper divisors (39445808856).

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

21232450344 is a wasteful number, since it uses less digits than its factorization.

21232450344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29422 (or 29418 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21232450344 its reverse (44305423212), we get a palindrome (65537873556).

The spelling of 21232450344 in words is "twenty-one billion, two hundred thirty-two million, four hundred fifty thousand, three hundred forty-four".