20808489670 has 8 divisors (see below), whose sum is σ = 37455281424. Its totient is φ = 8323395864.

The previous prime is 20808489659. The next prime is 20808489671. The reversal of 20808489670 is 7698480802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808489671) 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, 1040424474 + ... + 1040424493.

It is an arithmetic number, because the mean of its divisors is an integer number (4681910178).

Almost surely, 2^20808489670 is an apocalyptic number.

20808489670 is a deficient number, since it is larger than the sum of its proper divisors (16646791754).

20808489670 is a wasteful number, since it uses less digits than its factorization.

20808489670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080848974.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 20808489670 in words is "twenty billion, eight hundred eight million, four hundred eighty-nine thousand, six hundred seventy".