21200230310 has 32 divisors (see below), whose sum is σ = 44539822080. Its totient is φ = 7113997152.

The previous prime is 21200230291. The next prime is 21200230321. The reversal of 21200230310 is 1303200212.

It is a happy number.

It is a super-2 number, since 2×21200230310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 3218630 + ... + 3225209.

It is an arithmetic number, because the mean of its divisors is an integer number (1391869440).

Almost surely, 2^21200230310 is an apocalyptic number.

21200230310 is an abundant number, since it is smaller than the sum of its proper divisors (23339591770).

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

21200230310 is a wasteful number, since it uses less digits than its factorization.

21200230310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443900.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21200230310 its reverse (1303200212), we get a palindrome (22503430522).

The spelling of 21200230310 in words is "twenty-one billion, two hundred million, two hundred thirty thousand, three hundred ten".