21030203310 has 64 divisors (see below), whose sum is σ = 50841941760. Its totient is φ = 5567143680.

The previous prime is 21030203309. The next prime is 21030203329. The reversal of 21030203310 is 1330203012.

It is a super-3 number, since 3×21030203310³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21030203310.

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, 2584909 + ... + 2593031.

It is an arithmetic number, because the mean of its divisors is an integer number (794405340).

Almost surely, 2^21030203310 is an apocalyptic number.

21030203310 is an abundant number, since it is smaller than the sum of its proper divisors (29811738450).

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

21030203310 is a wasteful number, since it uses less digits than its factorization.

21030203310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8753.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21030203310 its reverse (1330203012), we get a palindrome (22360406322).

The spelling of 21030203310 in words is "twenty-one billion, thirty million, two hundred three thousand, three hundred ten".