21130042030 has 16 divisors (see below), whose sum is σ = 38106807984. Its totient is φ = 8435854080.

The previous prime is 21130042009. The next prime is 21130042057. The reversal of 21130042030 is 3024003112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21130041995 and 21130042013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2014851 + ... + 2025310.

It is an arithmetic number, because the mean of its divisors is an integer number (2381675499).

Almost surely, 2^21130042030 is an apocalyptic number.

21130042030 is a deficient number, since it is larger than the sum of its proper divisors (16976765954).

21130042030 is a wasteful number, since it uses less digits than its factorization.

21130042030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040691.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21130042030 its reverse (3024003112), we get a palindrome (24154045142).

The spelling of 21130042030 in words is "twenty-one billion, one hundred thirty million, forty-two thousand, thirty".