23433210021 has 32 divisors (see below), whose sum is σ = 34166285440. Its totient is φ = 14198851584.

The previous prime is 23433210007. The next prime is 23433210043. The reversal of 23433210021 is 12001233432.

It is not a de Polignac number, because 23433210021 - 2⁹ = 23433209509 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 23433210021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23433210071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1755645 + ... + 1768941.

It is an arithmetic number, because the mean of its divisors is an integer number (1067696420).

Almost surely, 2^23433210021 is an apocalyptic number.

It is an amenable number.

23433210021 is a deficient number, since it is larger than the sum of its proper divisors (10733075419).

23433210021 is a wasteful number, since it uses less digits than its factorization.

23433210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14005.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 23433210021 its reverse (12001233432), we get a palindrome (35434443453).

The spelling of 23433210021 in words is "twenty-three billion, four hundred thirty-three million, two hundred ten thousand, twenty-one".