21452944990609 has 8 divisors (see below), whose sum is σ = 23425105351680. Its totient is φ = 19484433402000.

The previous prime is 21452944990567. The next prime is 21452944990637. The reversal of 21452944990609 is 90609944925412.

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 21452944990609 - 2¹⁷ = 21452944859537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21452944990669) 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, 912180817 + ... + 912204334.

It is an arithmetic number, because the mean of its divisors is an integer number (2928138168960).

Almost surely, 2^{21452944990609} is an apocalyptic number.

It is an amenable number.

21452944990609 is a deficient number, since it is larger than the sum of its proper divisors (1972160361071).

21452944990609 is a wasteful number, since it uses less digits than its factorization.

21452944990609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824386231.

The product of its (nonzero) digits is 50388480, while the sum is 64.

The spelling of 21452944990609 in words is "twenty-one trillion, four hundred fifty-two billion, nine hundred forty-four million, nine hundred ninety thousand, six hundred nine".