21432023324 has 6 divisors (see below), whose sum is σ = 37506040824. Its totient is φ = 10716011660.

The previous prime is 21432023317. The next prime is 21432023387. The reversal of 21432023324 is 42332023412.

It is a junction number, because it is equal to n+sod(n) for n = 21432023293 and 21432023302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2679002912 + ... + 2679002919.

It is an arithmetic number, because the mean of its divisors is an integer number (6251006804).

Almost surely, 2^21432023324 is an apocalyptic number.

It is an amenable number.

21432023324 is a deficient number, since it is larger than the sum of its proper divisors (16074017500).

21432023324 is a wasteful number, since it uses less digits than its factorization.

21432023324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358005835 (or 5358005833 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21432023324 its reverse (42332023412), we get a palindrome (63764046736).

The spelling of 21432023324 in words is "twenty-one billion, four hundred thirty-two million, twenty-three thousand, three hundred twenty-four".