20379427 has 4 divisors (see below), whose sum is σ = 20424096. Its totient is φ = 20334760.

The previous prime is 20379421. The next prime is 20379451. The reversal of 20379427 is 72497302.

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

It is a cyclic number.

It is not a de Polignac number, because 20379427 - 2⁷ = 20379299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20379392 and 20379401.

It is not an unprimeable number, because it can be changed into a prime (20379421) 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, 21643 + ... + 22564.

It is an arithmetic number, because the mean of its divisors is an integer number (5106024).

Almost surely, 2^20379427 is an apocalyptic number.

20379427 is a deficient number, since it is larger than the sum of its proper divisors (44669).

20379427 is an equidigital number, since it uses as much as digits as its factorization.

20379427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44668.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20379427 is about 4514.3578723889. The cubic root of 20379427 is about 273.1475585087.

The spelling of 20379427 in words is "twenty million, three hundred seventy-nine thousand, four hundred twenty-seven".