20281463 has 8 divisors (see below), whose sum is σ = 20686176. Its totient is φ = 19879200.

The previous prime is 20281453. The next prime is 20281477. The reversal of 20281463 is 36418202.

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-20281463 is a prime.

It is a super-2 number, since 2×20281463² = 822675482840738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20281403) 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, 30353 + ... + 31013.

It is an arithmetic number, because the mean of its divisors is an integer number (2585772).

Almost surely, 2^20281463 is an apocalyptic number.

20281463 is a deficient number, since it is larger than the sum of its proper divisors (404713).

20281463 is an equidigital number, since it uses as much as digits as its factorization.

20281463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20281463 is about 4503.4945320273. The cubic root of 20281463 is about 272.7091814700.

Adding to 20281463 its reverse (36418202), we get a palindrome (56699665).

The spelling of 20281463 in words is "twenty million, two hundred eighty-one thousand, four hundred sixty-three".