16320020 has 24 divisors (see below), whose sum is σ = 34419168. Its totient is φ = 6500000.

The previous prime is 16319999. The next prime is 16320023. The reversal of 16320020 is 2002361.

It is a junction number, because it is equal to n+sod(n) for n = 16319977 and 16320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395 + ... + 6645.

It is an arithmetic number, because the mean of its divisors is an integer number (1434132).

Almost surely, 2^16320020 is an apocalyptic number.

16320020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16320020 is an abundant number, since it is smaller than the sum of its proper divisors (18099148).

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

16320020 is a wasteful number, since it uses less digits than its factorization.

16320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 16320020 is about 4039.8044507129. The cubic root of 16320020 is about 253.6531318318.

Adding to 16320020 its reverse (2002361), we get a palindrome (18322381).

The spelling of 16320020 in words is "sixteen million, three hundred twenty thousand, twenty".