18907866936 has 192 divisors, whose sum is σ = 60969242880. Its totient is φ = 5377570560.

The previous prime is 18907866889. The next prime is 18907866941. The reversal of 18907866936 is 63966870981.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3085956 + ... + 3092076.

It is an arithmetic number, because the mean of its divisors is an integer number (317548140).

Almost surely, 2^18907866936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18907866936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30484621440).

18907866936 is an abundant number, since it is smaller than the sum of its proper divisors (42061375944).

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

18907866936 is a wasteful number, since it uses less digits than its factorization.

18907866936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376 (or 6360 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 18907866936 in words is "eighteen billion, nine hundred seven million, eight hundred sixty-six thousand, nine hundred thirty-six".