21230254424 has 32 divisors (see below), whose sum is σ = 40073806080. Its totient is φ = 10543998624.

The previous prime is 21230254417. The next prime is 21230254453. The reversal of 21230254424 is 42445203212.

It is a congruent number.

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, 2168789 + ... + 2178555.

It is an arithmetic number, because the mean of its divisors is an integer number (1252306440).

Almost surely, 2^21230254424 is an apocalyptic number.

It is an amenable number.

21230254424 is a deficient number, since it is larger than the sum of its proper divisors (18843551656).

21230254424 is a wasteful number, since it uses less digits than its factorization.

21230254424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11567 (or 11563 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 21230254424 its reverse (42445203212), we get a palindrome (63675457636).

The spelling of 21230254424 in words is "twenty-one billion, two hundred thirty million, two hundred fifty-four thousand, four hundred twenty-four".