16721531330 has 48 divisors (see below), whose sum is σ = 36541094976. Its totient is φ = 5395848960.

The previous prime is 16721531293. The next prime is 16721531413. The reversal of 16721531330 is 3313512761.

16721531330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16721531330² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393056 + ... + 433515.

It is an arithmetic number, because the mean of its divisors is an integer number (761272812).

Almost surely, 2^16721531330 is an apocalyptic number.

16721531330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16721531330 is an abundant number, since it is smaller than the sum of its proper divisors (19819563646).

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

16721531330 is a wasteful number, since it uses less digits than its factorization.

16721531330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826619 (or 826602 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The spelling of 16721531330 in words is "sixteen billion, seven hundred twenty-one million, five hundred thirty-one thousand, three hundred thirty".