20055481 has 8 divisors (see below), whose sum is σ = 20758784. Its totient is φ = 19355760.

The previous prime is 20055479. The next prime is 20055487. The reversal of 20055481 is 18455002.

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

It is a cyclic number.

It is not a de Polignac number, because 20055481 - 2¹ = 20055479 is a prime.

It is a super-2 number, since 2×20055481² = 804444636282722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20055487) 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, 15595 + ... + 16831.

It is an arithmetic number, because the mean of its divisors is an integer number (2594848).

Almost surely, 2^20055481 is an apocalyptic number.

It is an amenable number.

20055481 is a deficient number, since it is larger than the sum of its proper divisors (703303).

20055481 is a wasteful number, since it uses less digits than its factorization.

20055481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20055481 is about 4478.3346234957. The cubic root of 20055481 is about 271.6925275961.

The spelling of 20055481 in words is "twenty million, fifty-five thousand, four hundred eighty-one".