16345620 has 72 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 4294080.

The previous prime is 16345583. The next prime is 16345631. The reversal of 16345620 is 2654361.

16345620 is a `hidden beast` number, since 1 + 6 + 34 + 5 + 620 = 666.

16345620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12141 + ... + 13419.

It is an arithmetic number, because the mean of its divisors is an integer number (698880).

Almost surely, 2^16345620 is an apocalyptic number.

16345620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16345620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25159680).

16345620 is an abundant number, since it is smaller than the sum of its proper divisors (33973740).

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

16345620 is a wasteful number, since it uses less digits than its factorization.

16345620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 16345620 is about 4042.9716793468. The cubic root of 16345620 is about 253.7856914698.

Adding to 16345620 its reverse (2654361), we get a palindrome (18999981).

The spelling of 16345620 in words is "sixteen million, three hundred forty-five thousand, six hundred twenty".