23321024021 has 4 divisors (see below), whose sum is σ = 23464097952. Its totient is φ = 23177950092.

The previous prime is 23321023993. The next prime is 23321024029. The reversal of 23321024021 is 12042012332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23321024021 is a prime.

It is a super-2 number, since 2×23321024021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23321023984 and 23321024002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321024029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71536721 + ... + 71537046.

It is an arithmetic number, because the mean of its divisors is an integer number (5866024488).

Almost surely, 2^23321024021 is an apocalyptic number.

It is an amenable number.

23321024021 is a deficient number, since it is larger than the sum of its proper divisors (143073931).

23321024021 is a wasteful number, since it uses less digits than its factorization.

23321024021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143073930.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23321024021 its reverse (12042012332), we get a palindrome (35363036353).

The spelling of 23321024021 in words is "twenty-three billion, three hundred twenty-one million, twenty-four thousand, twenty-one".