20662372663 has 4 divisors (see below), whose sum is σ = 20751052608. Its totient is φ = 20573692720.

The previous prime is 20662372651. The next prime is 20662372691. The reversal of 20662372663 is 36627326602.

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

It is a cyclic number.

It is not a de Polignac number, because 20662372663 - 2⁹ = 20662372151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662372693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44339623 + ... + 44340088.

It is an arithmetic number, because the mean of its divisors is an integer number (5187763152).

Almost surely, 2^20662372663 is an apocalyptic number.

20662372663 is a deficient number, since it is larger than the sum of its proper divisors (88679945).

20662372663 is an equidigital number, since it uses as much as digits as its factorization.

20662372663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88679944.

The product of its (nonzero) digits is 653184, while the sum is 43.

The spelling of 20662372663 in words is "twenty billion, six hundred sixty-two million, three hundred seventy-two thousand, six hundred sixty-three".