21302232194 has 24 divisors (see below), whose sum is σ = 33954930660. Its totient is φ = 10021211136.

The previous prime is 21302232163. The next prime is 21302232241. The reversal of 21302232194 is 49123220312.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 16766883169 + 4535349025 = 129487^2 + 67345^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2868374 + ... + 2875790.

Almost surely, 2^21302232194 is an apocalyptic number.

21302232194 is a deficient number, since it is larger than the sum of its proper divisors (12652698466).

21302232194 is a wasteful number, since it uses less digits than its factorization.

21302232194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12422 (or 12405 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21302232194 in words is "twenty-one billion, three hundred two million, two hundred thirty-two thousand, one hundred ninety-four".