21130244030 has 64 divisors (see below), whose sum is σ = 44748374400. Its totient is φ = 7180411392.

The previous prime is 21130244029. The next prime is 21130244081. The reversal of 21130244030 is 3044203112.

It is a junction number, because it is equal to n+sod(n) for n = 21130243993 and 21130244011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360332 + ... + 414848.

It is an arithmetic number, because the mean of its divisors is an integer number (699193350).

Almost surely, 2^21130244030 is an apocalyptic number.

21130244030 is an abundant number, since it is smaller than the sum of its proper divisors (23618130370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21130244030 is a wasteful number, since it uses less digits than its factorization.

21130244030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54658 (or 54644 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21130244030 its reverse (3044203112), we get a palindrome (24174447142).

The spelling of 21130244030 in words is "twenty-one billion, one hundred thirty million, two hundred forty-four thousand, thirty".