20200716639 has 6 divisors (see below), whose sum is σ = 29178812936. Its totient is φ = 13467144420.

The previous prime is 20200716637. The next prime is 20200716649. The reversal of 20200716639 is 93661700202.

20200716639 is a `hidden beast` number, since 2 + 0 + 2 + 0 + 0 + 7 + 16 + 639 = 666.

It is not a de Polignac number, because 20200716639 - 2¹ = 20200716637 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 (20200716637) 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 5 ways as a sum of consecutive naturals, for example, 1122262027 + ... + 1122262044.

Almost surely, 2^20200716639 is an apocalyptic number.

20200716639 is a deficient number, since it is larger than the sum of its proper divisors (8978096297).

20200716639 is a wasteful number, since it uses less digits than its factorization.

20200716639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244524077 (or 2244524074 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 20200716639 in words is "twenty billion, two hundred million, seven hundred sixteen thousand, six hundred thirty-nine".