11819821610 has 8 divisors (see below), whose sum is σ = 21275678916. Its totient is φ = 4727928640.

The previous prime is 11819821579. The next prime is 11819821619. The reversal of 11819821610 is 1612891811.

It can be written as a sum of positive squares in 2 ways, for example, as 10980734521 + 839087089 = 104789^2 + 28967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11819821619) by changing a digit.

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, 590991071 + ... + 590991090.

Almost surely, 2^11819821610 is an apocalyptic number.

11819821610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11819821610 is a deficient number, since it is larger than the sum of its proper divisors (9455857306).

11819821610 is a wasteful number, since it uses less digits than its factorization.

11819821610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181982168.

The product of its (nonzero) digits is 6912, while the sum is 38.

The spelling of 11819821610 in words is "eleven billion, eight hundred nineteen million, eight hundred twenty-one thousand, six hundred ten".