22533871921 has 16 divisors (see below), whose sum is σ = 26230703040. Its totient is φ = 19141297920.

The previous prime is 22533871891. The next prime is 22533871951. The reversal of 22533871921 is 12917833522.

It is an interprime number because it is at equal distance from previous prime (22533871891) and next prime (22533871951).

It is a cyclic number.

It is not a de Polignac number, because 22533871921 - 2⁵ = 22533871889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22533871951) 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, 723220 + ... + 753733.

It is an arithmetic number, because the mean of its divisors is an integer number (1639418940).

Almost surely, 2^22533871921 is an apocalyptic number.

It is an amenable number.

22533871921 is a deficient number, since it is larger than the sum of its proper divisors (3696831119).

22533871921 is a wasteful number, since it uses less digits than its factorization.

22533871921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477056.

The product of its digits is 181440, while the sum is 43.

The spelling of 22533871921 in words is "twenty-two billion, five hundred thirty-three million, eight hundred seventy-one thousand, nine hundred twenty-one".