16051620 has 72 divisors (see below), whose sum is σ = 48698496. Its totient is φ = 3948672.

The previous prime is 16051597. The next prime is 16051649. The reversal of 16051620 is 2615061.

It is a happy 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, 9349 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (676368).

Almost surely, 2^16051620 is an apocalyptic number.

16051620 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 16051620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24349248).

16051620 is an abundant number, since it is smaller than the sum of its proper divisors (32646876).

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

16051620 is a wasteful number, since it uses less digits than its factorization.

16051620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 16051620 is about 4006.4473040338. The cubic root of 16051620 is about 252.2549070943.

Adding to 16051620 its reverse (2615061), we get a palindrome (18666681).

The spelling of 16051620 in words is "sixteen million, fifty-one thousand, six hundred twenty".