20666446589152 has 288 divisors, whose sum is σ = 52083944607744. Its totient is φ = 7895538892800.

The previous prime is 20666446589137. The next prime is 20666446589177. The reversal of 20666446589152 is 25198564466602.

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, 571493952 + ... + 571530112.

It is an arithmetic number, because the mean of its divisors is an integer number (180847029888).

Almost surely, 2^{20666446589152} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20666446589152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26041972303872).

20666446589152 is an abundant number, since it is smaller than the sum of its proper divisors (31417498018592).

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

20666446589152 is a wasteful number, since it uses less digits than its factorization.

20666446589152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36722 (or 36701 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 64.

The spelling of 20666446589152 in words is "twenty trillion, six hundred sixty-six billion, four hundred forty-six million, five hundred eighty-nine thousand, one hundred fifty-two".