21003423230 has 16 divisors (see below), whose sum is σ = 37807832160. Its totient is φ = 8400998112.

The previous prime is 21003423223. The next prime is 21003423241. The reversal of 21003423230 is 3232430012.

It is a super-2 number, since 2×21003423230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364751 + ... + 418389.

It is an arithmetic number, because the mean of its divisors is an integer number (2362989510).

Almost surely, 2^21003423230 is an apocalyptic number.

21003423230 is a deficient number, since it is larger than the sum of its proper divisors (16804408930).

21003423230 is a wasteful number, since it uses less digits than its factorization.

21003423230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92803.

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

Adding to 21003423230 its reverse (3232430012), we get a palindrome (24235853242).

The spelling of 21003423230 in words is "twenty-one billion, three million, four hundred twenty-three thousand, two hundred thirty".