21030330030 has 32 divisors (see below), whose sum is σ = 50481504288. Its totient is φ = 5607120000.

The previous prime is 21030330023. The next prime is 21030330043. The reversal of 21030330030 is 3003303012.

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 = 21030329991 and 21030330009.

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, 125580 + ... + 240480.

It is an arithmetic number, because the mean of its divisors is an integer number (1577547009).

Almost surely, 2^21030330030 is an apocalyptic number.

21030330030 is an abundant number, since it is smaller than the sum of its proper divisors (29451174258).

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

21030330030 is a wasteful number, since it uses less digits than its factorization.

21030330030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121012.

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

Adding to 21030330030 its reverse (3003303012), we get a palindrome (24033633042).

The spelling of 21030330030 in words is "twenty-one billion, thirty million, three hundred thirty thousand, thirty".