18277824854 has 4 divisors (see below), whose sum is σ = 27416737284. Its totient is φ = 9138912426.

The previous prime is 18277824821. The next prime is 18277824871. The reversal of 18277824854 is 45842877281.

It is a happy number.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18277824854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569456212 + ... + 4569456215.

It is an arithmetic number, because the mean of its divisors is an integer number (6854184321).

Almost surely, 2^18277824854 is an apocalyptic number.

18277824854 is a deficient number, since it is larger than the sum of its proper divisors (9138912430).

18277824854 is an equidigital number, since it uses as much as digits as its factorization.

18277824854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138912429.

The product of its digits is 8028160, while the sum is 56.

The spelling of 18277824854 in words is "eighteen billion, two hundred seventy-seven million, eight hundred twenty-four thousand, eight hundred fifty-four".