20815473223177 has 8 divisors (see below), whose sum is σ = 21492131569920. Its totient is φ = 20139139343280.

The previous prime is 20815473223169. The next prime is 20815473223211. The reversal of 20815473223177 is 77132237451802.

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

It is a cyclic number.

It is not a de Polignac number, because 20815473223177 - 2³ = 20815473223169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20815473224177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80986318 + ... + 81242935.

It is an arithmetic number, because the mean of its divisors is an integer number (2686516446240).

Almost surely, 2^{20815473223177} is an apocalyptic number.

It is an amenable number.

20815473223177 is a deficient number, since it is larger than the sum of its proper divisors (676658346743).

20815473223177 is a wasteful number, since it uses less digits than its factorization.

20815473223177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162233423.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 20815473223177 in words is "twenty trillion, eight hundred fifteen billion, four hundred seventy-three million, two hundred twenty-three thousand, one hundred seventy-seven".