21303421432209 has 24 divisors (see below), whose sum is σ = 35224366399040. Its totient is φ = 12153717443808.

The previous prime is 21303421432151. The next prime is 21303421432231. The reversal of 21303421432209 is 90223412430312.

21303421432209 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 3 + 421 + 4 + 3 + 220 + 9 = 666.

It is not a de Polignac number, because 21303421432209 - 2⁹ = 21303421431697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21303421432109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273102802 + ... + 273180795.

Almost surely, 2^{21303421432209} is an apocalyptic number.

It is an amenable number.

21303421432209 is a deficient number, since it is larger than the sum of its proper divisors (13920944966831).

21303421432209 is a wasteful number, since it uses less digits than its factorization.

21303421432209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546284229 (or 546284226 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 21303421432209 in words is "twenty-one trillion, three hundred three billion, four hundred twenty-one million, four hundred thirty-two thousand, two hundred nine".