16506423320 has 32 divisors (see below), whose sum is σ = 37271646720. Its totient is φ = 6579068160.

The previous prime is 16506423301. The next prime is 16506423341. The reversal of 16506423320 is 2332460561.

It is a congruent number.

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, 723032 + ... + 745511.

It is an arithmetic number, because the mean of its divisors is an integer number (1164738960).

Almost surely, 2^16506423320 is an apocalyptic number.

16506423320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16506423320 is an abundant number, since it is smaller than the sum of its proper divisors (20765223400).

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

16506423320 is a wasteful number, since it uses less digits than its factorization.

16506423320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468835 (or 1468831 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 16506423320 its reverse (2332460561), we get a palindrome (18838883881).

The spelling of 16506423320 in words is "sixteen billion, five hundred six million, four hundred twenty-three thousand, three hundred twenty".