20157170512463 has 8 divisors (see below), whose sum is σ = 20187936858240. Its totient is φ = 20126407094560.

The previous prime is 20157170512441. The next prime is 20157170512487. The reversal of 20157170512463 is 36421507175102.

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 20157170512463 - 2²⁶ = 20157103403599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157170515463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13251293 + ... + 14693913.

It is an arithmetic number, because the mean of its divisors is an integer number (2523492107280).

Almost surely, 2^{20157170512463} is an apocalyptic number.

20157170512463 is a deficient number, since it is larger than the sum of its proper divisors (30766345777).

20157170512463 is a wasteful number, since it uses less digits than its factorization.

20157170512463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463937.

The product of its (nonzero) digits is 352800, while the sum is 44.

Adding to 20157170512463 its reverse (36421507175102), we get a palindrome (56578677687565).

The spelling of 20157170512463 in words is "twenty trillion, one hundred fifty-seven billion, one hundred seventy million, five hundred twelve thousand, four hundred sixty-three".