21532626889 has 4 divisors (see below), whose sum is σ = 21533174224. Its totient is φ = 21532079556.

The previous prime is 21532626827. The next prime is 21532626917. The reversal of 21532626889 is 98862623512.

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 21532626889 - 2¹⁵ = 21532594121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21532606889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209667 + ... + 295000.

It is an arithmetic number, because the mean of its divisors is an integer number (5383293556).

Almost surely, 2^21532626889 is an apocalyptic number.

It is an amenable number.

21532626889 is a deficient number, since it is larger than the sum of its proper divisors (547335).

21532626889 is an equidigital number, since it uses as much as digits as its factorization.

21532626889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547334.

The product of its digits is 2488320, while the sum is 52.

The spelling of 21532626889 in words is "twenty-one billion, five hundred thirty-two million, six hundred twenty-six thousand, eight hundred eighty-nine".