21235464043432 has 16 divisors (see below), whose sum is σ = 41189477670900. Its totient is φ = 10251603331200.

The previous prime is 21235464043363. The next prime is 21235464043481. The reversal of 21235464043432 is 23434046453212.

It can be written as a sum of positive squares in 2 ways, for example, as 20444812300836 + 790651742596 = 4521594^2 + 889186^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45766086069 + ... + 45766086532.

Almost surely, 2^{21235464043432} is an apocalyptic number.

It is an amenable number.

21235464043432 is a deficient number, since it is larger than the sum of its proper divisors (19954013627468).

21235464043432 is a wasteful number, since it uses less digits than its factorization.

21235464043432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91532172636 (or 91532172632 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 43.

The spelling of 21235464043432 in words is "twenty-one trillion, two hundred thirty-five billion, four hundred sixty-four million, forty-three thousand, four hundred thirty-two".