21442312204 has 12 divisors (see below), whose sum is σ = 38817979200. Its totient is φ = 10351461008.

The previous prime is 21442312201. The next prime is 21442312217. The reversal of 21442312204 is 40221324412.

It is not an unprimeable number, because it can be changed into a prime (21442312201) 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, 92423644 + ... + 92423875.

It is an arithmetic number, because the mean of its divisors is an integer number (3234831600).

Almost surely, 2^21442312204 is an apocalyptic number.

It is an amenable number.

21442312204 is a deficient number, since it is larger than the sum of its proper divisors (17375666996).

21442312204 is a wasteful number, since it uses less digits than its factorization.

21442312204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184847552 (or 184847550 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21442312204 its reverse (40221324412), we get a palindrome (61663636616).

The spelling of 21442312204 in words is "twenty-one billion, four hundred forty-two million, three hundred twelve thousand, two hundred four".