20293178208 has 48 divisors (see below), whose sum is σ = 55585668096. Its totient is φ = 6470288000.

The previous prime is 20293178173. The next prime is 20293178237. The reversal of 20293178208 is 80287139202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20293178208.

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, 4593168 + ... + 4597583.

It is an arithmetic number, because the mean of its divisors is an integer number (1158034752).

Almost surely, 2^20293178208 is an apocalyptic number.

It is an amenable number.

20293178208 is an abundant number, since it is smaller than the sum of its proper divisors (35292489888).

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

20293178208 is a wasteful number, since it uses less digits than its factorization.

20293178208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9190787 (or 9190779 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 20293178208 in words is "twenty billion, two hundred ninety-three million, one hundred seventy-eight thousand, two hundred eight".