23530431021 has 8 divisors (see below), whose sum is σ = 31842175584. Its totient is φ = 15452820240.

The previous prime is 23530431007. The next prime is 23530431047. The reversal of 23530431021 is 12013403532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23530431021 - 2¹³ = 23530422829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23530430982 and 23530431000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23530431721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58533210 + ... + 58533611.

It is an arithmetic number, because the mean of its divisors is an integer number (3980271948).

Almost surely, 2^23530431021 is an apocalyptic number.

It is an amenable number.

23530431021 is a deficient number, since it is larger than the sum of its proper divisors (8311744563).

23530431021 is a wasteful number, since it uses less digits than its factorization.

23530431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117066891.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 23530431021 its reverse (12013403532), we get a palindrome (35543834553).

The spelling of 23530431021 in words is "twenty-three billion, five hundred thirty million, four hundred thirty-one thousand, twenty-one".