20867363178 has 16 divisors (see below), whose sum is σ = 41762147616. Its totient is φ = 6951217520.

The previous prime is 20867363173. The next prime is 20867363189. The reversal of 20867363178 is 87136376802.

It is a self number, because there is not a number n which added to its sum of digits gives 20867363178.

It is not an unprimeable number, because it can be changed into a prime (20867363173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132653 + ... + 1150928.

It is an arithmetic number, because the mean of its divisors is an integer number (2610134226).

Almost surely, 2^20867363178 is an apocalyptic number.

20867363178 is an abundant number, since it is smaller than the sum of its proper divisors (20894784438).

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

20867363178 is a wasteful number, since it uses less digits than its factorization.

20867363178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285109.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 20867363178 in words is "twenty billion, eight hundred sixty-seven million, three hundred sixty-three thousand, one hundred seventy-eight".