20115463 has 8 divisors (see below), whose sum is σ = 20416320. Its totient is φ = 19816800.

The previous prime is 20115451. The next prime is 20115467. The reversal of 20115463 is 36451102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20115463 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 (20115467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27618 + ... + 28336.

It is an arithmetic number, because the mean of its divisors is an integer number (2552040).

Almost surely, 2^20115463 is an apocalyptic number.

20115463 is a deficient number, since it is larger than the sum of its proper divisors (300857).

20115463 is a wasteful number, since it uses less digits than its factorization.

20115463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20115463 is about 4485.0265328089. The cubic root of 20115463 is about 271.9631176562.

Adding to 20115463 its reverse (36451102), we get a palindrome (56566565).

The spelling of 20115463 in words is "twenty million, one hundred fifteen thousand, four hundred sixty-three".