18261877815011 has 4 divisors (see below), whose sum is σ = 18261892972224. Its totient is φ = 18261862657800.

The previous prime is 18261877814959. The next prime is 18261877815017. The reversal of 18261877815011 is 11051877816281.

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 18261877815011 - 2¹⁰ = 18261877813987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18261877815017) 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, 5598995 + ... + 8238476.

It is an arithmetic number, because the mean of its divisors is an integer number (4565473243056).

Almost surely, 2^{18261877815011} is an apocalyptic number.

18261877815011 is a deficient number, since it is larger than the sum of its proper divisors (15157213).

18261877815011 is a wasteful number, since it uses less digits than its factorization.

18261877815011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15157212.

The product of its (nonzero) digits is 1505280, while the sum is 56.

The spelling of 18261877815011 in words is "eighteen trillion, two hundred sixty-one billion, eight hundred seventy-seven million, eight hundred fifteen thousand, eleven".