20995414666 has 16 divisors (see below), whose sum is σ = 31989553344. Its totient is φ = 10332489024.

The previous prime is 20995414663. The next prime is 20995414709. The reversal of 20995414666 is 66641459902.

It is not an unprimeable number, because it can be changed into a prime (20995414663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99826 + ... + 227938.

It is an arithmetic number, because the mean of its divisors is an integer number (1999347084).

Almost surely, 2^20995414666 is an apocalyptic number.

20995414666 is a deficient number, since it is larger than the sum of its proper divisors (10994138678).

20995414666 is a wasteful number, since it uses less digits than its factorization.

20995414666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129405.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 20995414666 in words is "twenty billion, nine hundred ninety-five million, four hundred fourteen thousand, six hundred sixty-six".