20136427 has 4 divisors (see below), whose sum is σ = 20604760. Its totient is φ = 19668096.

The previous prime is 20136421. The next prime is 20136433. The reversal of 20136427 is 72463102.

20136427 = T₄₉₃ + T₄₉₄ + ... + T₆₂₁.

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 (20136421) and next prime (20136433).

It is a cyclic number.

It is not a de Polignac number, because 20136427 - 2³ = 20136419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20136421) 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, 234102 + ... + 234187.

It is an arithmetic number, because the mean of its divisors is an integer number (5151190).

Almost surely, 2^20136427 is an apocalyptic number.

20136427 is a deficient number, since it is larger than the sum of its proper divisors (468333).

20136427 is an equidigital number, since it uses as much as digits as its factorization.

20136427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468332.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20136427 is about 4487.3630341215. The cubic root of 20136427 is about 272.0575633288.

Adding to 20136427 its reverse (72463102), we get a palindrome (92599529).

The spelling of 20136427 in words is "twenty million, one hundred thirty-six thousand, four hundred twenty-seven".