21432888115 has 4 divisors (see below), whose sum is σ = 25719465744. Its totient is φ = 17146310488.

The previous prime is 21432888083. The next prime is 21432888131. The reversal of 21432888115 is 51188823412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21432888115 - 2⁵ = 21432888083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143288807 + ... + 2143288816.

It is an arithmetic number, because the mean of its divisors is an integer number (6429866436).

Almost surely, 2^21432888115 is an apocalyptic number.

21432888115 is a deficient number, since it is larger than the sum of its proper divisors (4286577629).

21432888115 is an equidigital number, since it uses as much as digits as its factorization.

21432888115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286577628.

The product of its digits is 122880, while the sum is 43.

The spelling of 21432888115 in words is "twenty-one billion, four hundred thirty-two million, eight hundred eighty-eight thousand, one hundred fifteen".