21474521089 has 4 divisors (see below), whose sum is σ = 24542309824. Its totient is φ = 18406732356.

The previous prime is 21474521063. The next prime is 21474521137. The reversal of 21474521089 is 98012547412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21474521089 - 2⁹ = 21474520577 is a prime.

It is a super-2 number, since 2×21474521089² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21474524089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1533894357 + ... + 1533894370.

It is an arithmetic number, because the mean of its divisors is an integer number (6135577456).

Almost surely, 2^21474521089 is an apocalyptic number.

It is an amenable number.

21474521089 is a deficient number, since it is larger than the sum of its proper divisors (3067788735).

21474521089 is an equidigital number, since it uses as much as digits as its factorization.

21474521089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067788734.

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 21474521089 in words is "twenty-one billion, four hundred seventy-four million, five hundred twenty-one thousand, eighty-nine".