21030340330 has 32 divisors (see below), whose sum is σ = 38838320640. Its totient is φ = 8194174080.

The previous prime is 21030340313. The next prime is 21030340363. The reversal of 21030340330 is 3304303012.

It is a junction number, because it is equal to n+sod(n) for n = 21030340298 and 21030340307.

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, 225631 + ... + 304909.

It is an arithmetic number, because the mean of its divisors is an integer number (1213697520).

Almost surely, 2^21030340330 is an apocalyptic number.

21030340330 is a deficient number, since it is larger than the sum of its proper divisors (17807980310).

21030340330 is a wasteful number, since it uses less digits than its factorization.

21030340330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79974.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21030340330 its reverse (3304303012), we get a palindrome (24334643342).

The spelling of 21030340330 in words is "twenty-one billion, thirty million, three hundred forty thousand, three hundred thirty".