20115008 has 28 divisors (see below), whose sum is σ = 40520112. Its totient is φ = 9905280.

The previous prime is 20114993. The next prime is 20115023. The reversal of 20115008 is 80051102.

It is an interprime number because it is at equal distance from previous prime (20114993) and next prime (20115023).

It is a super-2 number, since 2×20115008² = 809227093680128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943 + ... + 6633.

Almost surely, 2^20115008 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 20115008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20260056).

20115008 is an abundant number, since it is smaller than the sum of its proper divisors (20405104).

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

20115008 is an equidigital number, since it uses as much as digits as its factorization.

20115008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770 (or 4760 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 20115008 is about 4484.9758081845. The cubic root of 20115008 is about 271.9610670919.

The spelling of 20115008 in words is "twenty million, one hundred fifteen thousand, eight".