11818194931 has 8 divisors (see below), whose sum is σ = 12029197824. Its totient is φ = 11609035200.

The previous prime is 11818194919. The next prime is 11818194977. The reversal of 11818194931 is 13949181811.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11818194931 - 2⁷ = 11818194803 is a prime.

It is a super-2 number, since 2×11818194931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11818194131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447850 + ... + 473503.

It is an arithmetic number, because the mean of its divisors is an integer number (1503649728).

Almost surely, 2^11818194931 is an apocalyptic number.

11818194931 is a deficient number, since it is larger than the sum of its proper divisors (211002893).

11818194931 is a wasteful number, since it uses less digits than its factorization.

11818194931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921581.

The product of its digits is 62208, while the sum is 46.

The spelling of 11818194931 in words is "eleven billion, eight hundred eighteen million, one hundred ninety-four thousand, nine hundred thirty-one".