20484066666 has 32 divisors (see below), whose sum is σ = 49574885760. Its totient is φ = 5508320256.

The previous prime is 20484066661. The next prime is 20484066727. The reversal of 20484066666 is 66666048402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20484066661) 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, 14343871 + ... + 14345298.

It is an arithmetic number, because the mean of its divisors is an integer number (1549215180).

Almost surely, 2^20484066666 is an apocalyptic number.

20484066666 is an abundant number, since it is smaller than the sum of its proper divisors (29090819094).

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

20484066666 is a wasteful number, since it uses less digits than its factorization.

20484066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28689198.

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 20484066666 in words is "twenty billion, four hundred eighty-four million, sixty-six thousand, six hundred sixty-six".