20480117 has 4 divisors (see below), whose sum is σ = 23405856. Its totient is φ = 17554380.

The previous prime is 20480111. The next prime is 20480137. The reversal of 20480117 is 71108402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71108402 = 2 ⋅35554201.

It is a cyclic number.

It is not a de Polignac number, because 20480117 - 2²⁴ = 3702901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20480092 and 20480101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20480111) 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, 1462859 + ... + 1462872.

It is an arithmetic number, because the mean of its divisors is an integer number (5851464).

Almost surely, 2^20480117 is an apocalyptic number.

It is an amenable number.

20480117 is a deficient number, since it is larger than the sum of its proper divisors (2925739).

20480117 is an equidigital number, since it uses as much as digits as its factorization.

20480117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925738.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20480117 is about 4525.4963263713. The cubic root of 20480117 is about 273.5966724756.

Adding to 20480117 its reverse (71108402), we get a palindrome (91588519).

The spelling of 20480117 in words is "twenty million, four hundred eighty thousand, one hundred seventeen".