11812019639 has 8 divisors (see below), whose sum is σ = 13504222080. Its totient is φ = 10121009976.

The previous prime is 11812019627. The next prime is 11812019641. The reversal of 11812019639 is 93691021811.

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

It is not a de Polignac number, because 11812019639 - 2²⁴ = 11795242423 is a prime.

It is a super-3 number, since 3×11812019639³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11812019596 and 11812019605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812019669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276869 + ... + 316670.

It is an arithmetic number, because the mean of its divisors is an integer number (1688027760).

Almost surely, 2^11812019639 is an apocalyptic number.

11812019639 is a deficient number, since it is larger than the sum of its proper divisors (1692202441).

11812019639 is an equidigital number, since it uses as much as digits as its factorization.

11812019639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596389.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 11812019639 in words is "eleven billion, eight hundred twelve million, nineteen thousand, six hundred thirty-nine".