21432301432 has 32 divisors (see below), whose sum is σ = 40893350400. Its totient is φ = 10528255584.

The previous prime is 21432301381. The next prime is 21432301447. The reversal of 21432301432 is 23410323412.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21432301397 and 21432301406.

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, 150393 + ... + 255895.

It is an arithmetic number, because the mean of its divisors is an integer number (1277917200).

Almost surely, 2^21432301432 is an apocalyptic number.

It is an amenable number.

21432301432 is a deficient number, since it is larger than the sum of its proper divisors (19461048968).

21432301432 is a wasteful number, since it uses less digits than its factorization.

21432301432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105955 (or 105951 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21432301432 its reverse (23410323412), we get a palindrome (44842624844).

The spelling of 21432301432 in words is "twenty-one billion, four hundred thirty-two million, three hundred one thousand, four hundred thirty-two".