11917208530 has 32 divisors (see below), whose sum is σ = 21582432000. Its totient is φ = 4737724992.

The previous prime is 11917208503. The next prime is 11917208533. The reversal of 11917208530 is 3580271911.

It is a self number, because there is not a number n which added to its sum of digits gives 11917208530.

It is not an unprimeable number, because it can be changed into a prime (11917208533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2172331 + ... + 2177809.

It is an arithmetic number, because the mean of its divisors is an integer number (674451000).

Almost surely, 2^11917208530 is an apocalyptic number.

11917208530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11917208530 is a deficient number, since it is larger than the sum of its proper divisors (9665223470).

11917208530 is a wasteful number, since it uses less digits than its factorization.

11917208530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6778.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 11917208530 in words is "eleven billion, nine hundred seventeen million, two hundred eight thousand, five hundred thirty".