21023264130 has 128 divisors (see below), whose sum is σ = 55732147200. Its totient is φ = 5032992000.

The previous prime is 21023264113. The next prime is 21023264161. The reversal of 21023264130 is 3146232012.

It is a self number, because there is not a number n which added to its sum of digits gives 21023264130.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20630761 + ... + 20631779.

It is an arithmetic number, because the mean of its divisors is an integer number (435407400).

Almost surely, 2^21023264130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023264130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27866073600).

21023264130 is an abundant number, since it is smaller than the sum of its proper divisors (34708883070).

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

21023264130 is a wasteful number, since it uses less digits than its factorization.

21023264130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21023264130 its reverse (3146232012), we get a palindrome (24169496142).

The spelling of 21023264130 in words is "twenty-one billion, twenty-three million, two hundred sixty-four thousand, one hundred thirty".