11908020640 has 36 divisors (see below), whose sum is σ = 28135960146. Its totient is φ = 4762656128.

The previous prime is 11908020637. The next prime is 11908020703. The reversal of 11908020640 is 4602080911.

It is a happy number.

11908020640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10717218576 + 1190802064 = 103524^2 + 34508^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1376007 + ... + 1384633.

Almost surely, 2^11908020640 is an apocalyptic number.

11908020640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11908020640 is an abundant number, since it is smaller than the sum of its proper divisors (16227939506).

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

11908020640 is an frugal number, since it uses more digits than its factorization.

11908020640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17269 (or 8634 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 11908020640 in words is "eleven billion, nine hundred eight million, twenty thousand, six hundred forty".