21325148671 has 4 divisors (see below), whose sum is σ = 22252329072. Its totient is φ = 20397968272.

The previous prime is 21325148659. The next prime is 21325148699. The reversal of 21325148671 is 17684152312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21325148671 - 2⁵ = 21325148639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325148641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463590166 + ... + 463590211.

It is an arithmetic number, because the mean of its divisors is an integer number (5563082268).

Almost surely, 2^21325148671 is an apocalyptic number.

21325148671 is a deficient number, since it is larger than the sum of its proper divisors (927180401).

21325148671 is an equidigital number, since it uses as much as digits as its factorization.

21325148671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927180400.

The product of its digits is 80640, while the sum is 40.

The spelling of 21325148671 in words is "twenty-one billion, three hundred twenty-five million, one hundred forty-eight thousand, six hundred seventy-one".