18354071254666 has 16 divisors (see below), whose sum is σ = 31473590819904. Its totient is φ = 7863663370464.

The previous prime is 18354071254661. The next prime is 18354071254681. The reversal of 18354071254666 is 66645217045381.

It is a self number, because there is not a number n which added to its sum of digits gives 18354071254666.

It is not an unprimeable number, because it can be changed into a prime (18354071254661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197215755 + ... + 197308798.

It is an arithmetic number, because the mean of its divisors is an integer number (1967099426244).

Almost surely, 2^{18354071254666} is an apocalyptic number.

18354071254666 is a deficient number, since it is larger than the sum of its proper divisors (13119519565238).

18354071254666 is a wasteful number, since it uses less digits than its factorization.

18354071254666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394527885.

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 18354071254666 in words is "eighteen trillion, three hundred fifty-four billion, seventy-one million, two hundred fifty-four thousand, six hundred sixty-six".