20483281 has 32 divisors (see below), whose sum is σ = 26707968. Its totient is φ = 15275520.

The previous prime is 20483279. The next prime is 20483293. The reversal of 20483281 is 18238402.

It is not a de Polignac number, because 20483281 - 2¹ = 20483279 is a prime.

It is a super-2 number, since 2×20483281² = 839129601049922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20483201) 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 31 ways as a sum of consecutive naturals, for example, 149445 + ... + 149581.

It is an arithmetic number, because the mean of its divisors is an integer number (834624).

Almost surely, 2^20483281 is an apocalyptic number.

It is an amenable number.

20483281 is a deficient number, since it is larger than the sum of its proper divisors (6224687).

20483281 is a wasteful number, since it uses less digits than its factorization.

20483281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20483281 is about 4525.8458877872. The cubic root of 20483281 is about 273.6107611857.

It can be divided in two parts, 2048 and 3281, that added together give a square (5329 = 73²).

The spelling of 20483281 in words is "twenty million, four hundred eighty-three thousand, two hundred eighty-one".