20080680646 has 16 divisors (see below), whose sum is σ = 32969796048. Its totient is φ = 9116071200.

The previous prime is 20080680629. The next prime is 20080680661. The reversal of 20080680646 is 64608608002.

It is a junction number, because it is equal to n+sod(n) for n = 20080680599 and 20080680608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6329020 + ... + 6332191.

It is an arithmetic number, because the mean of its divisors is an integer number (2060612253).

Almost surely, 2^20080680646 is an apocalyptic number.

20080680646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20080680646 is a deficient number, since it is larger than the sum of its proper divisors (12889115402).

20080680646 is a wasteful number, since it uses less digits than its factorization.

20080680646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661287.

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 20080680646 in words is "twenty billion, eighty million, six hundred eighty thousand, six hundred forty-six".