21423536105 has 8 divisors (see below), whose sum is σ = 25744003200. Its totient is φ = 17114988976.

The previous prime is 21423536083. The next prime is 21423536177. The reversal of 21423536105 is 50163532412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21423536105 - 2¹⁸ = 21423273961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2976035 + ... + 2983224.

It is an arithmetic number, because the mean of its divisors is an integer number (3218000400).

Almost surely, 2^21423536105 is an apocalyptic number.

It is an amenable number.

21423536105 is a deficient number, since it is larger than the sum of its proper divisors (4320467095).

21423536105 is an equidigital number, since it uses as much as digits as its factorization.

21423536105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959983.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 21423536105 in words is "twenty-one billion, four hundred twenty-three million, five hundred thirty-six thousand, one hundred five".