21310200030 has 64 divisors (see below), whose sum is σ = 58581273600. Its totient is φ = 4860033024.

The previous prime is 21310200013. The next prime is 21310200053. The reversal of 21310200030 is 3000201312.

It is a happy number.

It is a super-2 number, since 2×21310200030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21310199979 and 21310200015.

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, 18714 + ... + 207293.

It is an arithmetic number, because the mean of its divisors is an integer number (915332400).

Almost surely, 2^21310200030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21310200030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29290636800).

21310200030 is an abundant number, since it is smaller than the sum of its proper divisors (37271073570).

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

21310200030 is a wasteful number, since it uses less digits than its factorization.

21310200030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226473.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21310200030 its reverse (3000201312), we get a palindrome (24310401342).

The spelling of 21310200030 in words is "twenty-one billion, three hundred ten million, two hundred thousand, thirty".