20482081 has 4 divisors (see below), whose sum is σ = 20670100. Its totient is φ = 20294064.

The previous prime is 20482069. The next prime is 20482109. The reversal of 20482081 is 18028402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4800481 + 15681600 = 2191^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 20482081 - 2⁷ = 20481953 is a prime.

It is a super-2 number, since 2×20482081² = 839031284181122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20482051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93846 + ... + 94063.

It is an arithmetic number, because the mean of its divisors is an integer number (5167525).

Almost surely, 2^20482081 is an apocalyptic number.

It is an amenable number.

20482081 is a deficient number, since it is larger than the sum of its proper divisors (188019).

20482081 is a wasteful number, since it uses less digits than its factorization.

20482081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188018.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 20482081 is about 4525.7133139429. The cubic root of 20482081 is about 273.6054179772.

The spelling of 20482081 in words is "twenty million, four hundred eighty-two thousand, eighty-one".