11894473133 has 2 divisors, whose sum is σ = 11894473134. Its totient is φ = 11894473132.

The previous prime is 11894473121. The next prime is 11894473169. The reversal of 11894473133 is 33137449811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8511538564 + 3382934569 = 92258^2 + 58163^2 .

It is an emirp because it is prime and its reverse (33137449811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11894473133 - 2²⁴ = 11877695917 is a prime.

It is a super-2 number, since 2×11894473133² (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 (11894473193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5947236566 + 5947236567.

It is an arithmetic number, because the mean of its divisors is an integer number (5947236567).

Almost surely, 2^11894473133 is an apocalyptic number.

It is an amenable number.

11894473133 is a deficient number, since it is larger than the sum of its proper divisors (1).

11894473133 is an equidigital number, since it uses as much as digits as its factorization.

11894473133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The spelling of 11894473133 in words is "eleven billion, eight hundred ninety-four million, four hundred seventy-three thousand, one hundred thirty-three".