21030001300 has 432 divisors, whose sum is σ = 62517873600. Its totient is φ = 6049075200.

The previous prime is 21030001297. The next prime is 21030001303. The reversal of 21030001300 is 310003012.

It is an interprime number because it is at equal distance from previous prime (21030001297) and next prime (21030001303).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030001303) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 54061506 + ... + 54061894.

It is an arithmetic number, because the mean of its divisors is an integer number (144717300).

Almost surely, 2^21030001300 is an apocalyptic number.

21030001300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030001300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31258936800).

21030001300 is an abundant number, since it is smaller than the sum of its proper divisors (41487872300).

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

21030001300 is a wasteful number, since it uses less digits than its factorization.

21030001300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 21030001300 its reverse (310003012), we get a palindrome (21340004312).

The spelling of 21030001300 in words is "twenty-one billion, thirty million, one thousand, three hundred".