21432233112 has 64 divisors (see below), whose sum is σ = 54266306400. Its totient is φ = 7052897280.

The previous prime is 21432233077. The next prime is 21432233117. The reversal of 21432233112 is 21133223412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432233117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438662 + ... + 1453482.

Almost surely, 2^21432233112 is an apocalyptic number.

It is an amenable number.

21432233112 is an abundant number, since it is smaller than the sum of its proper divisors (32834073288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21432233112 is a wasteful number, since it uses less digits than its factorization.

21432233112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15596 (or 15592 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 21432233112 its reverse (21133223412), we get a palindrome (42565456524).

The spelling of 21432233112 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-three thousand, one hundred twelve".