18854205361 has 4 divisors (see below), whose sum is σ = 18855093312. Its totient is φ = 18853317412.

The previous prime is 18854205341. The next prime is 18854205373. The reversal of 18854205361 is 16350245881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18854205361 - 2¹⁷ = 18854074289 is a prime.

It is a super-2 number, since 2×18854205361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18854205341) 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, 411325 + ... + 454858.

It is an arithmetic number, because the mean of its divisors is an integer number (4713773328).

Almost surely, 2^18854205361 is an apocalyptic number.

It is an amenable number.

18854205361 is a deficient number, since it is larger than the sum of its proper divisors (887951).

18854205361 is an equidigital number, since it uses as much as digits as its factorization.

18854205361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887950.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 18854205361 in words is "eighteen billion, eight hundred fifty-four million, two hundred five thousand, three hundred sixty-one".