20428800463 has 4 divisors (see below), whose sum is σ = 20863455840. Its totient is φ = 19994145088.

The previous prime is 20428800461. The next prime is 20428800493. The reversal of 20428800463 is 36400882402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36400882402 = 2 ⋅18200441201.

It is a cyclic number.

It is not a de Polignac number, because 20428800463 - 2¹ = 20428800461 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 (20428800461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217327618 + ... + 217327711.

It is an arithmetic number, because the mean of its divisors is an integer number (5215863960).

Almost surely, 2^20428800463 is an apocalyptic number.

20428800463 is a deficient number, since it is larger than the sum of its proper divisors (434655377).

20428800463 is an equidigital number, since it uses as much as digits as its factorization.

20428800463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434655376.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 20428800463 in words is "twenty billion, four hundred twenty-eight million, eight hundred thousand, four hundred sixty-three".