20665373488 has 10 divisors (see below), whose sum is σ = 40039161164. Its totient is φ = 10332686736.

The previous prime is 20665373479. The next prime is 20665373489. The reversal of 20665373488 is 88437356602.

It is a super-2 number, since 2×20665373488² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20665373489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645792906 + ... + 645792937.

Almost surely, 2^20665373488 is an apocalyptic number.

It is an amenable number.

20665373488 is a deficient number, since it is larger than the sum of its proper divisors (19373787676).

20665373488 is a wasteful number, since it uses less digits than its factorization.

20665373488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291585851 (or 1291585845 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 20665373488 in words is "twenty billion, six hundred sixty-five million, three hundred seventy-three thousand, four hundred eighty-eight".