20807117803 has 12 divisors (see below), whose sum is σ = 21191862720. Its totient is φ = 20428894656.

The previous prime is 20807117789. The next prime is 20807117843. The reversal of 20807117803 is 30871170802.

It is not a de Polignac number, because 20807117803 - 2¹³ = 20807109611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20807117843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1179613 + ... + 1197121.

It is an arithmetic number, because the mean of its divisors is an integer number (1765988560).

Almost surely, 2^20807117803 is an apocalyptic number.

20807117803 is a deficient number, since it is larger than the sum of its proper divisors (384744917).

20807117803 is an equidigital number, since it uses as much as digits as its factorization.

20807117803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17878 (or 17805 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 20807117803 in words is "twenty billion, eight hundred seven million, one hundred seventeen thousand, eight hundred three".