16521040330 has 16 divisors (see below), whose sum is σ = 29740400640. Its totient is φ = 6607854352.

The previous prime is 16521040309. The next prime is 16521040381. The reversal of 16521040330 is 3304012561.

It is a junction number, because it is equal to n+sod(n) for n = 16521040295 and 16521040304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65847 + ... + 193333.

It is an arithmetic number, because the mean of its divisors is an integer number (1858775040).

Almost surely, 2^16521040330 is an apocalyptic number.

16521040330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16521040330 is a deficient number, since it is larger than the sum of its proper divisors (13219360310).

16521040330 is a wasteful number, since it uses less digits than its factorization.

16521040330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140453.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 16521040330 its reverse (3304012561), we get a palindrome (19825052891).

The spelling of 16521040330 in words is "sixteen billion, five hundred twenty-one million, forty thousand, three hundred thirty".