21224345433 has 8 divisors (see below), whose sum is σ = 28361052768. Its totient is φ = 14118600864.

The previous prime is 21224345423. The next prime is 21224345489. The reversal of 21224345433 is 33454342212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21224345433 - 2²² = 21220151129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21224345394 and 21224345403.

It is not an unprimeable number, because it can be changed into a prime (21224345423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7739091 + ... + 7741832.

It is an arithmetic number, because the mean of its divisors is an integer number (3545131596).

Almost surely, 2^21224345433 is an apocalyptic number.

It is an amenable number.

21224345433 is a deficient number, since it is larger than the sum of its proper divisors (7136707335).

21224345433 is a wasteful number, since it uses less digits than its factorization.

21224345433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15481383.

The product of its digits is 69120, while the sum is 33.

Adding to 21224345433 its reverse (33454342212), we get a palindrome (54678687645).

The spelling of 21224345433 in words is "twenty-one billion, two hundred twenty-four million, three hundred forty-five thousand, four hundred thirty-three".