20787314208 has 24 divisors (see below), whose sum is σ = 54566700048. Its totient is φ = 6929104704.

The previous prime is 20787314203. The next prime is 20787314257. The reversal of 20787314208 is 80241378702.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20787314208² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20787314208.

It is not an unprimeable number, because it can be changed into a prime (20787314203) 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, 108267166 + ... + 108267357.

It is an arithmetic number, because the mean of its divisors is an integer number (2273612502).

Almost surely, 2^20787314208 is an apocalyptic number.

It is an amenable number.

20787314208 is an abundant number, since it is smaller than the sum of its proper divisors (33779385840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20787314208 is a wasteful number, since it uses less digits than its factorization.

20787314208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216534536 (or 216534528 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 20787314208 in words is "twenty billion, seven hundred eighty-seven million, three hundred fourteen thousand, two hundred eight".