21130302030 has 32 divisors (see below), whose sum is σ = 50718787200. Its totient is φ = 5634073632.

The previous prime is 21130302019. The next prime is 21130302043. The reversal of 21130302030 is 3020303112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245181 + ... + 319959.

It is an arithmetic number, because the mean of its divisors is an integer number (1584962100).

Almost surely, 2^21130302030 is an apocalyptic number.

21130302030 is an abundant number, since it is smaller than the sum of its proper divisors (29588485170).

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

21130302030 is a wasteful number, since it uses less digits than its factorization.

21130302030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84208.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21130302030 its reverse (3020303112), we get a palindrome (24150605142).

The spelling of 21130302030 in words is "twenty-one billion, one hundred thirty million, three hundred two thousand, thirty".