20666143008000 has 1728 divisors, whose sum is σ = 88488168018432. Its totient is φ = 4704716390400.

The previous prime is 20666143007989. The next prime is 20666143008011. The reversal of 20666143008000 is 80034166602.

It is an interprime number because it is at equal distance from previous prime (20666143007989) and next prime (20666143008011).

It is a tau number, because it is divible by the number of its divisors (1728).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17037215394 + ... + 17037216606.

Almost surely, 2^{20666143008000} is an apocalyptic number.

20666143008000 is a gapful number since it is divisible by the number (20) 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 20666143008000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44244084009216).

20666143008000 is an abundant number, since it is smaller than the sum of its proper divisors (67822025010432).

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

20666143008000 is an equidigital number, since it uses as much as digits as its factorization.

20666143008000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20666143008000 in words is "twenty trillion, six hundred sixty-six billion, one hundred forty-three million, eight thousand".