21435545033 has 4 divisors (see below), whose sum is σ = 24497765760. Its totient is φ = 18373324308.

The previous prime is 21435545017. The next prime is 21435545041. The reversal of 21435545033 is 33054553412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21435545033 - 2⁴ = 21435545017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21435544984 and 21435545002.

It is not an unprimeable number, because it can be changed into a prime (21435545063) 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, 1531110353 + ... + 1531110366.

It is an arithmetic number, because the mean of its divisors is an integer number (6124441440).

Almost surely, 2^21435545033 is an apocalyptic number.

It is an amenable number.

21435545033 is a deficient number, since it is larger than the sum of its proper divisors (3062220727).

21435545033 is an equidigital number, since it uses as much as digits as its factorization.

21435545033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062220726.

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 21435545033 in words is "twenty-one billion, four hundred thirty-five million, five hundred forty-five thousand, thirty-three".