21325421928023 has 2 divisors, whose sum is σ = 21325421928024. Its totient is φ = 21325421928022.

The previous prime is 21325421927947. The next prime is 21325421928047. The reversal of 21325421928023 is 32082912452312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21325421928023 - 2²⁸ = 21325153492567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21325421528023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10662710964011 + 10662710964012.

It is an arithmetic number, because the mean of its divisors is an integer number (10662710964012).

Almost surely, 2^{21325421928023} is an apocalyptic number.

21325421928023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21325421928023 is an equidigital number, since it uses as much as digits as its factorization.

21325421928023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 21325421928023 in words is "twenty-one trillion, three hundred twenty-five billion, four hundred twenty-one million, nine hundred twenty-eight thousand, twenty-three".