18685055354 has 16 divisors (see below), whose sum is σ = 33717393600. Its totient is φ = 7586413344.

The previous prime is 18685055329. The next prime is 18685055357. The reversal of 18685055354 is 45355058681.

It is not an unprimeable number, because it can be changed into a prime (18685055357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35122019 + ... + 35122550.

It is an arithmetic number, because the mean of its divisors is an integer number (2107337100).

Almost surely, 2^18685055354 is an apocalyptic number.

18685055354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18685055354 is a deficient number, since it is larger than the sum of its proper divisors (15032338246).

18685055354 is a wasteful number, since it uses less digits than its factorization.

18685055354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70244597.

The product of its (nonzero) digits is 2880000, while the sum is 50.

The spelling of 18685055354 in words is "eighteen billion, six hundred eighty-five million, fifty-five thousand, three hundred fifty-four".