20091500208 has 120 divisors (see below), whose sum is σ = 62641771920. Its totient is φ = 5968811520.

The previous prime is 20091500207. The next prime is 20091500251. The reversal of 20091500208 is 80200519002.

It is not an unprimeable number, because it can be changed into a prime (20091500207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130758 + ... + 239333.

It is an arithmetic number, because the mean of its divisors is an integer number (522014766).

Almost surely, 2^20091500208 is an apocalyptic number.

It is an amenable number.

20091500208 is an abundant number, since it is smaller than the sum of its proper divisors (42550271712).

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

20091500208 is a wasteful number, since it uses less digits than its factorization.

20091500208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370147 (or 370138 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 20091500208 in words is "twenty billion, ninety-one million, five hundred thousand, two hundred eight".