18969716205 has 192 divisors, whose sum is σ = 38437701120. Its totient is φ = 8567193600.

The previous prime is 18969716197. The next prime is 18969716209. The reversal of 18969716205 is 50261796981.

18969716205 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 9 + 7 + 1 + 620 + 5 = 666.

It is not a de Polignac number, because 18969716205 - 2³ = 18969716197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969716209) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 98288589 + ... + 98288781.

It is an arithmetic number, because the mean of its divisors is an integer number (200196360).

Almost surely, 2^18969716205 is an apocalyptic number.

18969716205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18969716205 is an abundant number, since it is smaller than the sum of its proper divisors (19467984915).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18969716205 is a wasteful number, since it uses less digits than its factorization.

18969716205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 18969716205 in words is "eighteen billion, nine hundred sixty-nine million, seven hundred sixteen thousand, two hundred five".