18367820855 has 8 divisors (see below), whose sum is σ = 22043005200. Its totient is φ = 14693176576.

The previous prime is 18367820843. The next prime is 18367820893. The reversal of 18367820855 is 55802876381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18367820855 - 2²⁶ = 18300711991 is a prime.

It is a super-2 number, since 2×18367820855² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18367820797 and 18367820806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55985 + ... + 199674.

It is an arithmetic number, because the mean of its divisors is an integer number (2755375650).

Almost surely, 2^18367820855 is an apocalyptic number.

18367820855 is a deficient number, since it is larger than the sum of its proper divisors (3675184345).

18367820855 is a wasteful number, since it uses less digits than its factorization.

18367820855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270033.

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 18367820855 in words is "eighteen billion, three hundred sixty-seven million, eight hundred twenty thousand, eight hundred fifty-five".