21334032424 has 32 divisors (see below), whose sum is σ = 40186624320. Its totient is φ = 10617699456.

The previous prime is 21334032413. The next prime is 21334032437. The reversal of 21334032424 is 42423043312.

It is a junction number, because it is equal to n+sod(n) for n = 21334032392 and 21334032401.

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, 1854739 + ... + 1866205.

It is an arithmetic number, because the mean of its divisors is an integer number (1255832010).

Almost surely, 2^21334032424 is an apocalyptic number.

It is an amenable number.

21334032424 is a deficient number, since it is larger than the sum of its proper divisors (18852591896).

21334032424 is a wasteful number, since it uses less digits than its factorization.

21334032424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12529 (or 12525 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21334032424 its reverse (42423043312), we get a palindrome (63757075736).

The spelling of 21334032424 in words is "twenty-one billion, three hundred thirty-four million, thirty-two thousand, four hundred twenty-four".