20320660988 has 12 divisors (see below), whose sum is σ = 35592060672. Its totient is φ = 10151500800.

The previous prime is 20320660981. The next prime is 20320660993. The reversal of 20320660988 is 88906602302.

It is a super-2 number, since 2×20320660988² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320660981) 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, 2202245 + ... + 2211452.

It is an arithmetic number, because the mean of its divisors is an integer number (2966005056).

Almost surely, 2^20320660988 is an apocalyptic number.

It is an amenable number.

20320660988 is a deficient number, since it is larger than the sum of its proper divisors (15271399684).

20320660988 is a wasteful number, since it uses less digits than its factorization.

20320660988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414852 (or 4414850 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 20320660988 in words is "twenty billion, three hundred twenty million, six hundred sixty thousand, nine hundred eighty-eight".