21432015041333 has 4 divisors (see below), whose sum is σ = 23080631582988. Its totient is φ = 19783398499680.

The previous prime is 21432015041279. The next prime is 21432015041377. The reversal of 21432015041333 is 33314051023412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2099259049924 + 19332755991409 = 1448882^2 + 4396903^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432015041333 - 2²² = 21432010847029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21432015041333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432015041233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824308270808 + ... + 824308270833.

It is an arithmetic number, because the mean of its divisors is an integer number (5770157895747).

Almost surely, 2^{21432015041333} is an apocalyptic number.

It is an amenable number.

21432015041333 is a deficient number, since it is larger than the sum of its proper divisors (1648616541655).

21432015041333 is a wasteful number, since it uses less digits than its factorization.

21432015041333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648616541654.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21432015041333 its reverse (33314051023412), we get a palindrome (54746066064745).

The spelling of 21432015041333 in words is "twenty-one trillion, four hundred thirty-two billion, fifteen million, forty-one thousand, three hundred thirty-three".