18969473654209 has 8 divisors (see below), whose sum is σ = 20452445861120. Its totient is φ = 17489898865296.

The previous prime is 18969473654107. The next prime is 18969473654213. The reversal of 18969473654209 is 90245637496981.

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

It is not a de Polignac number, because 18969473654209 - 2²³ = 18969465265601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18969473652209) 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, 849342897 + ... + 849365230.

It is an arithmetic number, because the mean of its divisors is an integer number (2556555732640).

It is a 1-persistent number, because it is pandigital, but 2⋅18969473654209 = 37938947308418 is not.

Almost surely, 2^{18969473654209} is an apocalyptic number.

It is an amenable number.

18969473654209 is a deficient number, since it is larger than the sum of its proper divisors (1482972206911).

18969473654209 is a wasteful number, since it uses less digits than its factorization.

18969473654209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698708999.

The product of its (nonzero) digits is 705438720, while the sum is 73.

The spelling of 18969473654209 in words is "eighteen trillion, nine hundred sixty-nine billion, four hundred seventy-three million, six hundred fifty-four thousand, two hundred nine".