21223545433 has 16 divisors (see below), whose sum is σ = 23705982720. Its totient is φ = 18882775296.

The previous prime is 21223545419. The next prime is 21223545443. The reversal of 21223545433 is 33454532212.

It is not a de Polignac number, because 21223545433 - 2¹⁷ = 21223414361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223545443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78591 + ... + 220507.

It is an arithmetic number, because the mean of its divisors is an integer number (1481623920).

Almost surely, 2^21223545433 is an apocalyptic number.

It is an amenable number.

21223545433 is a deficient number, since it is larger than the sum of its proper divisors (2482437287).

21223545433 is a wasteful number, since it uses less digits than its factorization.

21223545433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142416.

The product of its digits is 86400, while the sum is 34.

The spelling of 21223545433 in words is "twenty-one billion, two hundred twenty-three million, five hundred forty-five thousand, four hundred thirty-three".