20142579 has 4 divisors (see below), whose sum is σ = 26856776. Its totient is φ = 13428384.

The previous prime is 20142553. The next prime is 20142583. The reversal of 20142579 is 97524102.

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

It is not a de Polignac number, because 20142579 - 2⁵ = 20142547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20142509) 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, 3357094 + ... + 3357099.

It is an arithmetic number, because the mean of its divisors is an integer number (6714194).

Almost surely, 2^20142579 is an apocalyptic number.

20142579 is a deficient number, since it is larger than the sum of its proper divisors (6714197).

20142579 is an equidigital number, since it uses as much as digits as its factorization.

20142579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714196.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 20142579 is about 4488.0484623052. The cubic root of 20142579 is about 272.0852664844.

The spelling of 20142579 in words is "twenty million, one hundred forty-two thousand, five hundred seventy-nine".