23204002421 has 2 divisors, whose sum is σ = 23204002422. Its totient is φ = 23204002420.

The previous prime is 23204002403. The next prime is 23204002429. The reversal of 23204002421 is 12420040232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23108256196 + 95746225 = 152014^2 + 9785^2 .

It is a cyclic number.

It is not a de Polignac number, because 23204002421 - 2¹⁸ = 23203740277 is a prime.

It is a super-2 number, since 2×23204002421² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23204002393 and 23204002402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23204002429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602001210 + 11602001211.

It is an arithmetic number, because the mean of its divisors is an integer number (11602001211).

Almost surely, 2^23204002421 is an apocalyptic number.

It is an amenable number.

23204002421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23204002421 is an equidigital number, since it uses as much as digits as its factorization.

23204002421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 23204002421 its reverse (12420040232), we get a palindrome (35624042653).

The spelling of 23204002421 in words is "twenty-three billion, two hundred four million, two thousand, four hundred twenty-one".