20480277 has 16 divisors (see below), whose sum is σ = 28183232. Its totient is φ = 13219200.

The previous prime is 20480269. The next prime is 20480321. The reversal of 20480277 is 77208402.

It is not a de Polignac number, because 20480277 - 2³ = 20480269 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20480377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33777 + ... + 34377.

It is an arithmetic number, because the mean of its divisors is an integer number (1761452).

Almost surely, 2^20480277 is an apocalyptic number.

It is an amenable number.

20480277 is a deficient number, since it is larger than the sum of its proper divisors (7702955).

20480277 is a wasteful number, since it uses less digits than its factorization.

20480277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20480277 is about 4525.5140039558. The cubic root of 20480277 is about 273.5973849610.

Adding to 20480277 its reverse (77208402), we get a palindrome (97688679).

The spelling of 20480277 in words is "twenty million, four hundred eighty thousand, two hundred seventy-seven".