20161608 has 16 divisors (see below), whose sum is σ = 50404080. Its totient is φ = 6720528.

The previous prime is 20161607. The next prime is 20161619. The reversal of 20161608 is 80616102.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 840067 = 20161608 / (2 + 0 + 1 + 6 + 1 + 6 + 0 + 8).

It is not an unprimeable number, because it can be changed into a prime (20161601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420010 + ... + 420057.

It is an arithmetic number, because the mean of its divisors is an integer number (3150255).

Almost surely, 2^20161608 is an apocalyptic number.

It is an amenable number.

20161608 is an abundant number, since it is smaller than the sum of its proper divisors (30242472).

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

20161608 is a wasteful number, since it uses less digits than its factorization.

20161608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840076 (or 840072 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20161608 is about 4490.1679255903. The cubic root of 20161608 is about 272.1709205437.

The spelling of 20161608 in words is "twenty million, one hundred sixty-one thousand, six hundred eight".