21130030423 has 8 divisors (see below), whose sum is σ = 21217996800. Its totient is φ = 21042122328.

The previous prime is 21130030403. The next prime is 21130030429. The reversal of 21130030423 is 32403003112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21130030423 - 2⁹ = 21130029911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21130030423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130030429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807418 + ... + 833176.

It is an arithmetic number, because the mean of its divisors is an integer number (2652249600).

Almost surely, 2^21130030423 is an apocalyptic number.

21130030423 is a deficient number, since it is larger than the sum of its proper divisors (87966377).

21130030423 is a wasteful number, since it uses less digits than its factorization.

21130030423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29141.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21130030423 its reverse (32403003112), we get a palindrome (53533033535).

The spelling of 21130030423 in words is "twenty-one billion, one hundred thirty million, thirty thousand, four hundred twenty-three".