21481844745467 has 8 divisors (see below), whose sum is σ = 21509220397056. Its totient is φ = 21454470153792.

The previous prime is 21481844745463. The next prime is 21481844745503. The reversal of 21481844745467 is 76454744818412.

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 21481844745467 - 2² = 21481844745463 is a prime.

It is a super-2 number, since 2×21481844745467² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21481844745463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45270278 + ... + 45742340.

It is an arithmetic number, because the mean of its divisors is an integer number (2688652549632).

Almost surely, 2^{21481844745467} is an apocalyptic number.

21481844745467 is a deficient number, since it is larger than the sum of its proper divisors (27375651589).

21481844745467 is an equidigital number, since it uses as much as digits as its factorization.

21481844745467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529957.

The product of its digits is 192675840, while the sum is 65.

The spelling of 21481844745467 in words is "twenty-one trillion, four hundred eighty-one billion, eight hundred forty-four million, seven hundred forty-five thousand, four hundred sixty-seven".