18712286208 has 396 divisors, whose sum is σ = 68584849632. Its totient is φ = 4859043840.

The previous prime is 18712286207. The next prime is 18712286209. The reversal of 18712286208 is 80268221781.

It is a happy number.

18712286208 is a `hidden beast` number, since 1 + 8 + 7 + 12 + 2 + 8 + 620 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (18712286207) and next prime (18712286209).

It is a tau number, because it is divible by the number of its divisors (396).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712286207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4965541 + ... + 4969307.

Almost surely, 2^18712286208 is an apocalyptic number.

18712286208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18712286208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292424816).

18712286208 is an abundant number, since it is smaller than the sum of its proper divisors (49872563424).

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

18712286208 is a wasteful number, since it uses less digits than its factorization.

18712286208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3790 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 18712286208 in words is "eighteen billion, seven hundred twelve million, two hundred eighty-six thousand, two hundred eight".