11913681919 has 2 divisors, whose sum is σ = 11913681920. Its totient is φ = 11913681918.

The previous prime is 11913681883. The next prime is 11913681931. The reversal of 11913681919 is 91918631911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11913681919 - 2⁹ = 11913681407 is a prime.

It is a super-2 number, since 2×11913681919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11913681959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5956840959 + 5956840960.

It is an arithmetic number, because the mean of its divisors is an integer number (5956840960).

Almost surely, 2^11913681919 is an apocalyptic number.

11913681919 is a deficient number, since it is larger than the sum of its proper divisors (1).

11913681919 is an equidigital number, since it uses as much as digits as its factorization.

11913681919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 49.

The spelling of 11913681919 in words is "eleven billion, nine hundred thirteen million, six hundred eighty-one thousand, nine hundred nineteen".