20200716638 has 8 divisors (see below), whose sum is σ = 30310592232. Its totient is φ = 10097185896.

The previous prime is 20200716637. The next prime is 20200716649. The reversal of 20200716638 is 83661700202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20200716598 and 20200716607.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578245 + ... + 1590992.

It is an arithmetic number, because the mean of its divisors is an integer number (3788824029).

Almost surely, 2^20200716638 is an apocalyptic number.

20200716638 is a deficient number, since it is larger than the sum of its proper divisors (10109875594).

20200716638 is a wasteful number, since it uses less digits than its factorization.

20200716638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172426.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 20200716638 in words is "twenty billion, two hundred million, seven hundred sixteen thousand, six hundred thirty-eight".