18952571667856 has 80 divisors (see below), whose sum is σ = 38100487037760. Its totient is φ = 9122184368640.

The previous prime is 18952571667847. The next prime is 18952571667857. The reversal of 18952571667856 is 65876617525981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18952571667857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209322211 + ... + 209412733.

It is an arithmetic number, because the mean of its divisors is an integer number (476256087972).

Almost surely, 2^{18952571667856} is an apocalyptic number.

18952571667856 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 18952571667856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19050243518880).

18952571667856 is an abundant number, since it is smaller than the sum of its proper divisors (19147915369904).

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

18952571667856 is a wasteful number, since it uses less digits than its factorization.

18952571667856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91904 (or 91898 counting only the distinct ones).

The product of its digits is 1524096000, while the sum is 76.

The spelling of 18952571667856 in words is "eighteen trillion, nine hundred fifty-two billion, five hundred seventy-one million, six hundred sixty-seven thousand, eight hundred fifty-six".