21003330030 has 16 divisors (see below), whose sum is σ = 50407992144. Its totient is φ = 5600888000.

The previous prime is 21003330013. The next prime is 21003330031. The reversal of 21003330030 is 3003330012.

It is a super-2 number, since 2×21003330030² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 21003329991 and 21003330009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003330031) 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, 350055471 + ... + 350055530.

It is an arithmetic number, because the mean of its divisors is an integer number (3150499509).

Almost surely, 2^21003330030 is an apocalyptic number.

21003330030 is an abundant number, since it is smaller than the sum of its proper divisors (29404662114).

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

21003330030 is a wasteful number, since it uses less digits than its factorization.

21003330030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700111011.

The product of its (nonzero) digits is 162, while the sum is 15.

Adding to 21003330030 its reverse (3003330012), we get a palindrome (24006660042).

The spelling of 21003330030 in words is "twenty-one billion, three million, three hundred thirty thousand, thirty".