21230143204 has 24 divisors (see below), whose sum is σ = 37513365120. Its totient is φ = 10512141984.

The previous prime is 21230143163. The next prime is 21230143219. The reversal of 21230143204 is 40234103212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887667 + ... + 911269.

It is an arithmetic number, because the mean of its divisors is an integer number (1563056880).

Almost surely, 2^21230143204 is an apocalyptic number.

It is an amenable number.

21230143204 is a deficient number, since it is larger than the sum of its proper divisors (16283221916).

21230143204 is a wasteful number, since it uses less digits than its factorization.

21230143204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25779 (or 25777 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21230143204 its reverse (40234103212), we get a palindrome (61464246416).

The spelling of 21230143204 in words is "twenty-one billion, two hundred thirty million, one hundred forty-three thousand, two hundred four".