20666184480 has 960 divisors, whose sum is σ = 82987027200. Its totient is φ = 4817387520.

The previous prime is 20666184437. The next prime is 20666184481. The reversal of 20666184480 is 8448166602.

It is a super-2 number, since 2×20666184480² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20666184481) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 232204276 + ... + 232204364.

It is an arithmetic number, because the mean of its divisors is an integer number (86444820).

Almost surely, 2^20666184480 is an apocalyptic number.

20666184480 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 20666184480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41493513600).

20666184480 is an abundant number, since it is smaller than the sum of its proper divisors (62320842720).

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

20666184480 is a wasteful number, since it uses less digits than its factorization.

20666184480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 20666184480 in words is "twenty billion, six hundred sixty-six million, one hundred eighty-four thousand, four hundred eighty".