11311045019 has 4 divisors (see below), whose sum is σ = 11336578296. Its totient is φ = 11285511744.

The previous prime is 11311044973. The next prime is 11311045049. The reversal of 11311045019 is 91054011311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11311045019 - 2⁸ = 11311044763 is a prime.

It is a super-2 number, since 2×11311045019² (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 (11311045049) 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, 12765974 + ... + 12766859.

It is an arithmetic number, because the mean of its divisors is an integer number (2834144574).

Almost surely, 2^11311045019 is an apocalyptic number.

11311045019 is a deficient number, since it is larger than the sum of its proper divisors (25533277).

11311045019 is an equidigital number, since it uses as much as digits as its factorization.

11311045019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25533276.

The product of its (nonzero) digits is 540, while the sum is 26.

The spelling of 11311045019 in words is "eleven billion, three hundred eleven million, forty-five thousand, nineteen".