21430003304 has 8 divisors (see below), whose sum is σ = 40181256210. Its totient is φ = 10715001648.

The previous prime is 21430003289. The next prime is 21430003307. The reversal of 21430003304 is 40330003412.

It can be written as a sum of positive squares in only one way, i.e., 12137428900 + 9292574404 = 110170^2 + 96398^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21430003307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339375199 + ... + 1339375214.

Almost surely, 2^21430003304 is an apocalyptic number.

It is an amenable number.

21430003304 is a deficient number, since it is larger than the sum of its proper divisors (18751252906).

21430003304 is a wasteful number, since it uses less digits than its factorization.

21430003304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678750419 (or 2678750415 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21430003304 its reverse (40330003412), we get a palindrome (61760006716).

The spelling of 21430003304 in words is "twenty-one billion, four hundred thirty million, three thousand, three hundred four".