18036882261 has 12 divisors (see below), whose sum is σ = 26209284192. Its totient is φ = 11952583656.

The previous prime is 18036882257. The next prime is 18036882287. The reversal of 18036882261 is 16228863081.

It is not a de Polignac number, because 18036882261 - 2² = 18036882257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036882361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5998791 + ... + 6001796.

It is an arithmetic number, because the mean of its divisors is an integer number (2184107016).

Almost surely, 2^18036882261 is an apocalyptic number.

It is an amenable number.

18036882261 is a deficient number, since it is larger than the sum of its proper divisors (8172401931).

18036882261 is a wasteful number, since it uses less digits than its factorization.

18036882261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000760 (or 12000757 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 18036882261 in words is "eighteen billion, thirty-six million, eight hundred eighty-two thousand, two hundred sixty-one".