21310273195 has 4 divisors (see below), whose sum is σ = 25572327840. Its totient is φ = 17048218552.

The previous prime is 21310273183. The next prime is 21310273199. The reversal of 21310273195 is 59137201312.

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 21310273195 - 2⁵ = 21310273163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21310273195.

It is not an unprimeable number, because it can be changed into a prime (21310273199) 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, 2131027315 + ... + 2131027324.

It is an arithmetic number, because the mean of its divisors is an integer number (6393081960).

Almost surely, 2^21310273195 is an apocalyptic number.

21310273195 is a deficient number, since it is larger than the sum of its proper divisors (4262054645).

21310273195 is an equidigital number, since it uses as much as digits as its factorization.

21310273195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262054644.

The product of its (nonzero) digits is 11340, while the sum is 34.

The spelling of 21310273195 in words is "twenty-one billion, three hundred ten million, two hundred seventy-three thousand, one hundred ninety-five".