20815000071178 has 8 divisors (see below), whose sum is σ = 31222528123968. Its totient is φ = 10407490696524.

The previous prime is 20815000071137. The next prime is 20815000071197. The reversal of 20815000071178 is 87117000051802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20815000071178.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435576 + ... + 6609907.

It is an arithmetic number, because the mean of its divisors is an integer number (3902816015496).

Almost surely, 2^{20815000071178} is an apocalyptic number.

20815000071178 is a deficient number, since it is larger than the sum of its proper divisors (10407528052790).

20815000071178 is a wasteful number, since it uses less digits than its factorization.

20815000071178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9339068.

The product of its (nonzero) digits is 31360, while the sum is 40.

The spelling of 20815000071178 in words is "twenty trillion, eight hundred fifteen billion, seventy-one thousand, one hundred seventy-eight".