20973216662 has 4 divisors (see below), whose sum is σ = 31459824996. Its totient is φ = 10486608330.

The previous prime is 20973216661. The next prime is 20973216707. The reversal of 20973216662 is 26661237902.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20973216661) 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 as a sum of consecutive naturals, namely, 5243304164 + ... + 5243304167.

It is an arithmetic number, because the mean of its divisors is an integer number (7864956249).

Almost surely, 2^20973216662 is an apocalyptic number.

20973216662 is a deficient number, since it is larger than the sum of its proper divisors (10486608334).

20973216662 is a wasteful number, since it uses less digits than its factorization.

20973216662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10486608333.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 20973216662 in words is "twenty billion, nine hundred seventy-three million, two hundred sixteen thousand, six hundred sixty-two".