20662200617 has 4 divisors (see below), whose sum is σ = 21749684880. Its totient is φ = 19574716356.

The previous prime is 20662200613. The next prime is 20662200619. The reversal of 20662200617 is 71600226602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20662200617 - 2² = 20662200613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20662200613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543742103 + ... + 543742140.

It is an arithmetic number, because the mean of its divisors is an integer number (5437421220).

Almost surely, 2^20662200617 is an apocalyptic number.

It is an amenable number.

20662200617 is a deficient number, since it is larger than the sum of its proper divisors (1087484263).

20662200617 is a wasteful number, since it uses less digits than its factorization.

20662200617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087484262.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 20662200617 in words is "twenty billion, six hundred sixty-two million, two hundred thousand, six hundred seventeen".