20159408 has 40 divisors (see below), whose sum is σ = 42184800. Its totient is φ = 9304064.

The previous prime is 20159407. The next prime is 20159417. The reversal of 20159408 is 80495102.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (20159401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9728 + ... + 11616.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^20159408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20159408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21092400).

20159408 is an abundant number, since it is smaller than the sum of its proper divisors (22025392).

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

20159408 is a wasteful number, since it uses less digits than its factorization.

20159408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20159408 is about 4489.9229392051. The cubic root of 20159408 is about 272.1610205760.

The spelling of 20159408 in words is "twenty million, one hundred fifty-nine thousand, four hundred eight".