21303332205 has 32 divisors (see below), whose sum is σ = 35589286656. Its totient is φ = 10861069824.

The previous prime is 21303332177. The next prime is 21303332231. The reversal of 21303332205 is 50223330312.

It is not a de Polignac number, because 21303332205 - 2¹⁶ = 21303266669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 565849 + ... + 602321.

It is an arithmetic number, because the mean of its divisors is an integer number (1112165208).

Almost surely, 2^21303332205 is an apocalyptic number.

It is an amenable number.

21303332205 is a deficient number, since it is larger than the sum of its proper divisors (14285954451).

21303332205 is a wasteful number, since it uses less digits than its factorization.

21303332205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38197.

The product of its (nonzero) digits is 3240, while the sum is 24.

Adding to 21303332205 its reverse (50223330312), we get a palindrome (71526662517).

The spelling of 21303332205 in words is "twenty-one billion, three hundred three million, three hundred thirty-two thousand, two hundred five".