21042533150403 has 4 divisors (see below), whose sum is σ = 28056710867208. Its totient is φ = 14028355433600.

The previous prime is 21042533150311. The next prime is 21042533150473. The reversal of 21042533150403 is 30405133524012.

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 21042533150403 - 2²⁰ = 21042532101827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21042533150473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3507088858398 + ... + 3507088858403.

It is an arithmetic number, because the mean of its divisors is an integer number (7014177716802).

Almost surely, 2^{21042533150403} is an apocalyptic number.

21042533150403 is a deficient number, since it is larger than the sum of its proper divisors (7014177716805).

21042533150403 is an equidigital number, since it uses as much as digits as its factorization.

21042533150403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7014177716804.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 21042533150403 its reverse (30405133524012), we get a palindrome (51447666674415).

The spelling of 21042533150403 in words is "twenty-one trillion, forty-two billion, five hundred thirty-three million, one hundred fifty thousand, four hundred three".