23332013021 has 4 divisors (see below), whose sum is σ = 23333504700. Its totient is φ = 23330521344.

The previous prime is 23332012997. The next prime is 23332013059. The reversal of 23332013021 is 12031023332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1194739225 + 22137273796 = 34565^2 + 148786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23332013021 is a prime.

It is a super-2 number, since 2×23332013021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23332012984 and 23332013002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23332013521) 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, 722126 + ... + 753743.

It is an arithmetic number, because the mean of its divisors is an integer number (5833376175).

Almost surely, 2^23332013021 is an apocalyptic number.

It is an amenable number.

23332013021 is a deficient number, since it is larger than the sum of its proper divisors (1491679).

23332013021 is a wasteful number, since it uses less digits than its factorization.

23332013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491678.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 23332013021 its reverse (12031023332), we get a palindrome (35363036353).

The spelling of 23332013021 in words is "twenty-three billion, three hundred thirty-two million, thirteen thousand, twenty-one".