21352275623 has 6 divisors (see below), whose sum is σ = 24838361496. Its totient is φ = 18301950492.

The previous prime is 21352275619. The next prime is 21352275631. The reversal of 21352275623 is 32657225312.

It is not a de Polignac number, because 21352275623 - 2² = 21352275619 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 (21352275523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217880315 + ... + 217880412.

It is an arithmetic number, because the mean of its divisors is an integer number (4139726916).

Almost surely, 2^21352275623 is an apocalyptic number.

21352275623 is a deficient number, since it is larger than the sum of its proper divisors (3486085873).

21352275623 is an equidigital number, since it uses as much as digits as its factorization.

21352275623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435760741 (or 435760734 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The spelling of 21352275623 in words is "twenty-one billion, three hundred fifty-two million, two hundred seventy-five thousand, six hundred twenty-three".