23201430021 has 128 divisors (see below), whose sum is σ = 44856115200. Its totient is φ = 11492902080.

The previous prime is 23201430011. The next prime is 23201430023. The reversal of 23201430021 is 12003410232.

23201430021 is a `hidden beast` number, since 232 + 0 + 1 + 430 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 23201430021 - 2⁹ = 23201429509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23201429976 and 23201430003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201430023) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22330020 + ... + 22331058.

It is an arithmetic number, because the mean of its divisors is an integer number (350438400).

Almost surely, 2^23201430021 is an apocalyptic number.

23201430021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23201430021 is a deficient number, since it is larger than the sum of its proper divisors (21654685179).

23201430021 is a wasteful number, since it uses less digits than its factorization.

23201430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23201430021 its reverse (12003410232), we get a palindrome (35204840253).

It can be divided in two parts, 2320 and 1430021, that added together give a palindrome (1432341).

The spelling of 23201430021 in words is "twenty-three billion, two hundred one million, four hundred thirty thousand, twenty-one".