21301130020 has 12 divisors (see below), whose sum is σ = 44732373084. Its totient is φ = 8520452000.

The previous prime is 21301130017. The next prime is 21301130027. The reversal of 21301130020 is 2003110312.

It can be written as a sum of positive squares in 2 ways, for example, as 16629134116 + 4671995904 = 128954^2 + 68352^2 .

It is not an unprimeable number, because it can be changed into a prime (21301130027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532528231 + ... + 532528270.

It is an arithmetic number, because the mean of its divisors is an integer number (3727697757).

Almost surely, 2^21301130020 is an apocalyptic number.

21301130020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301130020 is an abundant number, since it is smaller than the sum of its proper divisors (23431243064).

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

21301130020 is a wasteful number, since it uses less digits than its factorization.

21301130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065056510 (or 1065056508 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21301130020 its reverse (2003110312), we get a palindrome (23304240332).

It can be divided in two parts, 21301 and 130020, that added together give a square (151321 = 389²).

The spelling of 21301130020 in words is "twenty-one billion, three hundred one million, one hundred thirty thousand, twenty".