21200030030 has 16 divisors (see below), whose sum is σ = 40404763440. Its totient is φ = 7981187712.

The previous prime is 21200030011. The next prime is 21200030039. The reversal of 21200030030 is 3003000212.

21200030030 is a modest number, since divided by 30030 gives 21200 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21200029993 and 21200030020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200030039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62352860 + ... + 62353199.

It is an arithmetic number, because the mean of its divisors is an integer number (2525297715).

Almost surely, 2^21200030030 is an apocalyptic number.

21200030030 is a deficient number, since it is larger than the sum of its proper divisors (19204733410).

21200030030 is a wasteful number, since it uses less digits than its factorization.

21200030030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124706083.

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 21200030030 its reverse (3003000212), we get a palindrome (24203030242).

The spelling of 21200030030 in words is "twenty-one billion, two hundred million, thirty thousand, thirty".