11892212642 has 18 divisors (see below), whose sum is σ = 18481594833. Its totient is φ = 5738909064.

The previous prime is 11892212641. The next prime is 11892212659. The reversal of 11892212642 is 24621229811.

It can be written as a sum of positive squares in 2 ways, for example, as 11885142361 + 7070281 = 109019^2 + 2659^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=77111.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11892212596 and 11892212605.

It is not an unprimeable number, because it can be changed into a prime (11892212641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4471109 + ... + 4473767.

Almost surely, 2^11892212642 is an apocalyptic number.

11892212642 is a deficient number, since it is larger than the sum of its proper divisors (6589382191).

11892212642 is an frugal number, since it uses more digits than its factorization.

11892212642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378 (or 2690 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The spelling of 11892212642 in words is "eleven billion, eight hundred ninety-two million, two hundred twelve thousand, six hundred forty-two".