21403024232 has 16 divisors (see below), whose sum is σ = 40210460640. Its totient is φ = 10680234736.

The previous prime is 21403024217. The next prime is 21403024267. The reversal of 21403024232 is 23242030412.

It is a junction number, because it is equal to n+sod(n) for n = 21403024198 and 21403024207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2655398 + ... + 2663445.

It is an arithmetic number, because the mean of its divisors is an integer number (2513153790).

Almost surely, 2^21403024232 is an apocalyptic number.

It is an amenable number.

21403024232 is a deficient number, since it is larger than the sum of its proper divisors (18807436408).

21403024232 is a wasteful number, since it uses less digits than its factorization.

21403024232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319352 (or 5319348 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21403024232 its reverse (23242030412), we get a palindrome (44645054644).

The spelling of 21403024232 in words is "twenty-one billion, four hundred three million, twenty-four thousand, two hundred thirty-two".