16506326420 has 24 divisors (see below), whose sum is σ = 34892850048. Its totient is φ = 6558804000.

The previous prime is 16506326411. The next prime is 16506326471. The reversal of 16506326420 is 2462360561.

It is a happy number.

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, 2729816 + ... + 2735855.

It is an arithmetic number, because the mean of its divisors is an integer number (1453868752).

Almost surely, 2^16506326420 is an apocalyptic number.

16506326420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16506326420 is an abundant number, since it is smaller than the sum of its proper divisors (18386523628).

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

16506326420 is a wasteful number, since it uses less digits than its factorization.

16506326420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465831 (or 5465829 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 16506326420 its reverse (2462360561), we get a palindrome (18968686981).

The spelling of 16506326420 in words is "sixteen billion, five hundred six million, three hundred twenty-six thousand, four hundred twenty".