21267195445 has 8 divisors (see below), whose sum is σ = 25575996600. Its totient is φ = 16976848320.

The previous prime is 21267195437. The next prime is 21267195473. The reversal of 21267195445 is 54459176212.

It can be written as a sum of positive squares in 4 ways, for example, as 9847044 + 21257348401 = 3138^2 + 145799^2 .

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

It is not a de Polignac number, because 21267195445 - 2³ = 21267195437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21267195395 and 21267195404.

It is a congruent number.

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, 4610970 + ... + 4615579.

It is an arithmetic number, because the mean of its divisors is an integer number (3196999575).

Almost surely, 2^21267195445 is an apocalyptic number.

It is an amenable number.

21267195445 is a deficient number, since it is larger than the sum of its proper divisors (4308801155).

21267195445 is an equidigital number, since it uses as much as digits as its factorization.

21267195445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9227015.

The product of its digits is 604800, while the sum is 46.

The spelling of 21267195445 in words is "twenty-one billion, two hundred sixty-seven million, one hundred ninety-five thousand, four hundred forty-five".