20200716640 has 48 divisors (see below), whose sum is σ = 51395290128. Its totient is φ = 7458725376.

The previous prime is 20200716637. The next prime is 20200716649. The reversal of 20200716640 is 4661700202.

It is a junction number, because it is equal to n+sod(n) for n = 20200716599 and 20200716608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200716649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4853862 + ... + 4858021.

It is an arithmetic number, because the mean of its divisors is an integer number (1070735211).

Almost surely, 2^20200716640 is an apocalyptic number.

20200716640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200716640 is an abundant number, since it is smaller than the sum of its proper divisors (31194573488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20200716640 is a wasteful number, since it uses less digits than its factorization.

20200716640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9711911 (or 9711903 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 20200716640 in words is "twenty billion, two hundred million, seven hundred sixteen thousand, six hundred forty".