11951890930 has 32 divisors (see below), whose sum is σ = 25434570240. Its totient is φ = 3956487360.

The previous prime is 11951890889. The next prime is 11951890931. The reversal of 11951890930 is 3909815911.

It is not an unprimeable number, because it can be changed into a prime (11951890931) 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, 2941786 + ... + 2945845.

It is an arithmetic number, because the mean of its divisors is an integer number (794830320).

Almost surely, 2^11951890930 is an apocalyptic number.

11951890930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11951890930 is an abundant number, since it is smaller than the sum of its proper divisors (13482679310).

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

11951890930 is a wasteful number, since it uses less digits than its factorization.

11951890930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5887674.

The product of its (nonzero) digits is 87480, while the sum is 46.

The spelling of 11951890930 in words is "eleven billion, nine hundred fifty-one million, eight hundred ninety thousand, nine hundred thirty".