11895943013 has 4 divisors (see below), whose sum is σ = 11909446668. Its totient is φ = 11882439360.

The previous prime is 11895942983. The next prime is 11895943019. The reversal of 11895943013 is 31034959811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31034959811 = 107269 ⋅289319.

It can be written as a sum of positive squares in 2 ways, for example, as 4863946564 + 7031996449 = 69742^2 + 83857^2 .

It is a cyclic number.

It is not a de Polignac number, because 11895943013 - 2⁸ = 11895942757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11895943019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6750506 + ... + 6752267.

It is an arithmetic number, because the mean of its divisors is an integer number (2977361667).

Almost surely, 2^11895943013 is an apocalyptic number.

It is an amenable number.

11895943013 is a deficient number, since it is larger than the sum of its proper divisors (13503655).

11895943013 is an equidigital number, since it uses as much as digits as its factorization.

11895943013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13503654.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 11895943013 in words is "eleven billion, eight hundred ninety-five million, nine hundred forty-three thousand, thirteen".