21467150045405 has 4 divisors (see below), whose sum is σ = 25760580054492. Its totient is φ = 17173720036320.

The previous prime is 21467150045351. The next prime is 21467150045413. The reversal of 21467150045405 is 50454005176412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11401771975801 + 10065378069604 = 3376651^2 + 3172598^2 .

It is not a de Polignac number, because 21467150045405 - 2²² = 21467145851101 is a prime.

It is a super-2 number, since 2×21467150045405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146715004536 + ... + 2146715004545.

It is an arithmetic number, because the mean of its divisors is an integer number (6440145013623).

Almost surely, 2^{21467150045405} is an apocalyptic number.

It is an amenable number.

21467150045405 is a deficient number, since it is larger than the sum of its proper divisors (4293430009087).

21467150045405 is an equidigital number, since it uses as much as digits as its factorization.

21467150045405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293430009086.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 21467150045405 in words is "twenty-one trillion, four hundred sixty-seven billion, one hundred fifty million, forty-five thousand, four hundred five".