18618408853 has 32 divisors (see below), whose sum is σ = 21077102592. Its totient is φ = 16299273600.

The previous prime is 18618408841. The next prime is 18618408863. The reversal of 18618408853 is 35880481681.

It is a cyclic number.

It is not a de Polignac number, because 18618408853 - 2²⁹ = 18081537941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18618408853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618408863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22622200 + ... + 22623022.

It is an arithmetic number, because the mean of its divisors is an integer number (658659456).

Almost surely, 2^18618408853 is an apocalyptic number.

It is an amenable number.

18618408853 is a deficient number, since it is larger than the sum of its proper divisors (2458693739).

18618408853 is a wasteful number, since it uses less digits than its factorization.

18618408853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 1474560, while the sum is 52.

The spelling of 18618408853 in words is "eighteen billion, six hundred eighteen million, four hundred eight thousand, eight hundred fifty-three".