20488662608 has 40 divisors (see below), whose sum is σ = 39925201320. Its totient is φ = 10185543680.

The previous prime is 20488662587. The next prime is 20488662619. The reversal of 20488662608 is 80626688402.

It can be written as a sum of positive squares in 4 ways, for example, as 2043763264 + 18444899344 = 45208^2 + 135812^2 .

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, 2237816 + ... + 2246952.

It is an arithmetic number, because the mean of its divisors is an integer number (998130033).

Almost surely, 2^20488662608 is an apocalyptic number.

It is an amenable number.

20488662608 is a deficient number, since it is larger than the sum of its proper divisors (19436538712).

20488662608 is a wasteful number, since it uses less digits than its factorization.

20488662608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935 (or 9929 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 20488662608 in words is "twenty billion, four hundred eighty-eight million, six hundred sixty-two thousand, six hundred eight".