23201304021 has 24 divisors (see below), whose sum is σ = 38592949824. Its totient is φ = 13156678080.

The previous prime is 23201304017. The next prime is 23201304029. The reversal of 23201304021 is 12040310232.

23201304021 is a `hidden beast` number, since 232 + 0 + 1 + 30 + 402 + 1 = 666.

It is not a de Polignac number, because 23201304021 - 2² = 23201304017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23201303985 and 23201304003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201304029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1397376 + ... + 1413881.

It is an arithmetic number, because the mean of its divisors is an integer number (1608039576).

Almost surely, 2^23201304021 is an apocalyptic number.

23201304021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23201304021 is a deficient number, since it is larger than the sum of its proper divisors (15391645803).

23201304021 is a wasteful number, since it uses less digits than its factorization.

23201304021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811401 (or 2811398 counting only the distinct ones).

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

Adding to 23201304021 its reverse (12040310232), we get a palindrome (35241614253).

The spelling of 23201304021 in words is "twenty-three billion, two hundred one million, three hundred four thousand, twenty-one".