18698895936 has 336 divisors, whose sum is σ = 62438970880. Its totient is φ = 5240401920.

The previous prime is 18698895857. The next prime is 18698895973. The reversal of 18698895936 is 63959889681.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68999481 + ... + 68999751.

Almost surely, 2^18698895936 is an apocalyptic number.

18698895936 is a gapful number since it is divisible by the number (16) 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 18698895936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31219485440).

18698895936 is an abundant number, since it is smaller than the sum of its proper divisors (43740074944).

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

18698895936 is a wasteful number, since it uses less digits than its factorization.

18698895936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 549 counting only the distinct ones).

The product of its digits is 201553920, while the sum is 72.

The spelling of 18698895936 in words is "eighteen billion, six hundred ninety-eight million, eight hundred ninety-five thousand, nine hundred thirty-six".