20283479 has 4 divisors (see below), whose sum is σ = 20778240. Its totient is φ = 19788720.

The previous prime is 20283467. The next prime is 20283491. The reversal of 20283479 is 97438202.

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 (20283467) and next prime (20283491).

It is a cyclic number.

It is not a de Polignac number, because 20283479 - 2⁴ = 20283463 is a prime.

It is a super-2 number, since 2×20283479² = 822839040686882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283409) 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 3 ways as a sum of consecutive naturals, for example, 247319 + ... + 247400.

It is an arithmetic number, because the mean of its divisors is an integer number (5194560).

Almost surely, 2^20283479 is an apocalyptic number.

20283479 is a deficient number, since it is larger than the sum of its proper divisors (494761).

20283479 is an equidigital number, since it uses as much as digits as its factorization.

20283479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494760.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20283479 is about 4503.7183526504. The cubic root of 20283479 is about 272.7182170360.

The spelling of 20283479 in words is "twenty million, two hundred eighty-three thousand, four hundred seventy-nine".