20023279 has 2 divisors, whose sum is σ = 20023280. Its totient is φ = 20023278.

The previous prime is 20023273. The next prime is 20023291. The reversal of 20023279 is 97232002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20023279 - 2¹³ = 20015087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20023273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011639 + 10011640.

It is an arithmetic number, because the mean of its divisors is an integer number (10011640).

Almost surely, 2^20023279 is an apocalyptic number.

20023279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023279 is an equidigital number, since it uses as much as digits as its factorization.

20023279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20023279 is about 4474.7378694176. The cubic root of 20023279 is about 271.5470357050.

It can be divided in two parts, 20023 and 279, that added together give a palindrome (20302).

The spelling of 20023279 in words is "twenty million, twenty-three thousand, two hundred seventy-nine".