20820882747 has 16 divisors (see below), whose sum is σ = 32109315840. Its totient is φ = 11754301152.

The previous prime is 20820882743. The next prime is 20820882853. The reversal of 20820882747 is 74728802802.

It is not a de Polignac number, because 20820882747 - 2² = 20820882743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20820882696 and 20820882705.

It is not an unprimeable number, because it can be changed into a prime (20820882743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5970972 + ... + 5974457.

It is an arithmetic number, because the mean of its divisors is an integer number (2006832240).

Almost surely, 2^20820882747 is an apocalyptic number.

20820882747 is a deficient number, since it is larger than the sum of its proper divisors (11288433093).

20820882747 is a wasteful number, since it uses less digits than its factorization.

20820882747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11945522.

The product of its (nonzero) digits is 802816, while the sum is 48.

The spelling of 20820882747 in words is "twenty billion, eight hundred twenty million, eight hundred eighty-two thousand, seven hundred forty-seven".