18277686881331 has 16 divisors (see below), whose sum is σ = 26157269869344. Its totient is φ = 11311251830784.

The previous prime is 18277686881327. The next prime is 18277686881339. The reversal of 18277686881331 is 13318868677281.

It is not a de Polignac number, because 18277686881331 - 2² = 18277686881327 is a prime.

It is a super-2 number, since 2×18277686881331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18277686881339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2454695026 + ... + 2454702471.

It is an arithmetic number, because the mean of its divisors is an integer number (1634829366834).

Almost surely, 2^{18277686881331} is an apocalyptic number.

18277686881331 is a deficient number, since it is larger than the sum of its proper divisors (7879582988013).

18277686881331 is a wasteful number, since it uses less digits than its factorization.

18277686881331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909397590.

The product of its digits is 130056192, while the sum is 69.

The spelling of 18277686881331 in words is "eighteen trillion, two hundred seventy-seven billion, six hundred eighty-six million, eight hundred eighty-one thousand, three hundred thirty-one".