21232032409 has 8 divisors (see below), whose sum is σ = 24857013888. Its totient is φ = 17755009440.

The previous prime is 21232032397. The next prime is 21232032413. The reversal of 21232032409 is 90423023212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21232032409 - 2⁷ = 21232032281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21232032439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36989317 + ... + 36989890.

It is an arithmetic number, because the mean of its divisors is an integer number (3107126736).

Almost surely, 2^21232032409 is an apocalyptic number.

It is an amenable number.

21232032409 is a deficient number, since it is larger than the sum of its proper divisors (3624981479).

21232032409 is an equidigital number, since it uses as much as digits as its factorization.

21232032409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73979255.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 21232032409 in words is "twenty-one billion, two hundred thirty-two million, thirty-two thousand, four hundred nine".