23021311533 has 48 divisors (see below), whose sum is σ = 35389320960. Its totient is φ = 13286021760.

The previous prime is 23021311531. The next prime is 23021311559. The reversal of 23021311533 is 33511312032.

It is not a de Polignac number, because 23021311533 - 2¹ = 23021311531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021311531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 613023 + ... + 649491.

It is an arithmetic number, because the mean of its divisors is an integer number (737277520).

Almost surely, 2^23021311533 is an apocalyptic number.

It is an amenable number.

23021311533 is a deficient number, since it is larger than the sum of its proper divisors (12368009427).

23021311533 is a wasteful number, since it uses less digits than its factorization.

23021311533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36578 (or 36567 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 23021311533 its reverse (33511312032), we get a palindrome (56532623565).

The spelling of 23021311533 in words is "twenty-three billion, twenty-one million, three hundred eleven thousand, five hundred thirty-three".