20480051 has 4 divisors (see below), whose sum is σ = 21370512. Its totient is φ = 19589592.

The previous prime is 20480041. The next prime is 20480059. The reversal of 20480051 is 15008402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20480051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20480059) 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, 445196 + ... + 445241.

It is an arithmetic number, because the mean of its divisors is an integer number (5342628).

Almost surely, 2^20480051 is an apocalyptic number.

20480051 is a deficient number, since it is larger than the sum of its proper divisors (890461).

20480051 is an equidigital number, since it uses as much as digits as its factorization.

20480051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890460.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20480051 is about 4525.4890343476. The cubic root of 20480051 is about 273.5963785743.

Adding to 20480051 its reverse (15008402), we get a palindrome (35488453).

The spelling of 20480051 in words is "twenty million, four hundred eighty thousand, fifty-one".