18949036197936 has 240 divisors, whose sum is σ = 53415856999680. Its totient is φ = 5785527720960.

The previous prime is 18949036197919. The next prime is 18949036197947. The reversal of 18949036197936 is 63979163094981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3255285906 + ... + 3255291726.

It is an arithmetic number, because the mean of its divisors is an integer number (222566070832).

Almost surely, 2^{18949036197936} is an apocalyptic number.

18949036197936 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 18949036197936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26707928499840).

18949036197936 is an abundant number, since it is smaller than the sum of its proper divisors (34466820801744).

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

18949036197936 is a wasteful number, since it uses less digits than its factorization.

18949036197936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8884 (or 8865 counting only the distinct ones).

The product of its (nonzero) digits is 476171136, while the sum is 75.

The spelling of 18949036197936 in words is "eighteen trillion, nine hundred forty-nine billion, thirty-six million, one hundred ninety-seven thousand, nine hundred thirty-six".