23421205403 has 2 divisors, whose sum is σ = 23421205404. Its totient is φ = 23421205402.

The previous prime is 23421205391. The next prime is 23421205429. The reversal of 23421205403 is 30450212432.

It is an a-pointer prime, because the next prime (23421205429) can be obtained adding 23421205403 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23421205403 - 2⁸ = 23421205147 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23421205453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710602701 + 11710602702.

It is an arithmetic number, because the mean of its divisors is an integer number (11710602702).

Almost surely, 2^23421205403 is an apocalyptic number.

23421205403 is a deficient number, since it is larger than the sum of its proper divisors (1).

23421205403 is an equidigital number, since it uses as much as digits as its factorization.

23421205403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 23421205403 its reverse (30450212432), we get a palindrome (53871417835).

The spelling of 23421205403 in words is "twenty-three billion, four hundred twenty-one million, two hundred five thousand, four hundred three".