21003343204 has 12 divisors (see below), whose sum is σ = 38690369200. Its totient is φ = 9948952008.

The previous prime is 21003343181. The next prime is 21003343217. The reversal of 21003343204 is 40234330012.

It is a happy number.

It is a super-2 number, since 2×21003343204² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138179814 + ... + 138179965.

Almost surely, 2^21003343204 is an apocalyptic number.

It is an amenable number.

21003343204 is a deficient number, since it is larger than the sum of its proper divisors (17687025996).

21003343204 is a wasteful number, since it uses less digits than its factorization.

21003343204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276359802 (or 276359800 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21003343204 its reverse (40234330012), we get a palindrome (61237673216).

The spelling of 21003343204 in words is "twenty-one billion, three million, three hundred forty-three thousand, two hundred four".