20120479 has 4 divisors (see below), whose sum is σ = 20396176. Its totient is φ = 19844784.

The previous prime is 20120467. The next prime is 20120491. The reversal of 20120479 is 97402102.

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

It is an interprime number because it is at equal distance from previous prime (20120467) and next prime (20120491).

It is a cyclic number.

It is not a de Polignac number, because 20120479 - 2⁵ = 20120447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137739 + ... + 137884.

It is an arithmetic number, because the mean of its divisors is an integer number (5099044).

Almost surely, 2^20120479 is an apocalyptic number.

20120479 is a deficient number, since it is larger than the sum of its proper divisors (275697).

20120479 is an equidigital number, since it uses as much as digits as its factorization.

20120479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275696.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20120479 is about 4485.5856919693. The cubic root of 20120479 is about 271.9857213886.

The spelling of 20120479 in words is "twenty million, one hundred twenty thousand, four hundred seventy-nine".