18909912397248 has 336 divisors, whose sum is σ = 57330856128000. Its totient is φ = 6178686179328.

The previous prime is 18909912397213. The next prime is 18909912397261. The reversal of 18909912397248 is 84279321990981.

It is a happy number.

18909912397248 is a `hidden beast` number, since 1 + 8 + 90 + 99 + 123 + 97 + 248 = 666.

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

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, 170721148 + ... + 170831876.

It is an arithmetic number, because the mean of its divisors is an integer number (170627548000).

Almost surely, 2^{18909912397248} is an apocalyptic number.

18909912397248 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 18909912397248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28665428064000).

18909912397248 is an abundant number, since it is smaller than the sum of its proper divisors (38420943730752).

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

18909912397248 is a wasteful number, since it uses less digits than its factorization.

18909912397248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110974 (or 110952 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 18909912397248 in words is "eighteen trillion, nine hundred nine billion, nine hundred twelve million, three hundred ninety-seven thousand, two hundred forty-eight".