20413279 has 2 divisors, whose sum is σ = 20413280. Its totient is φ = 20413278.

The previous prime is 20413273. The next prime is 20413291. The reversal of 20413279 is 97231402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20413279 - 2⁵ = 20413247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206639 + 10206640.

It is an arithmetic number, because the mean of its divisors is an integer number (10206640).

Almost surely, 2^20413279 is an apocalyptic number.

20413279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413279 is an equidigital number, since it uses as much as digits as its factorization.

20413279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20413279 is about 4518.1056871215. The cubic root of 20413279 is about 273.2987154585.

The spelling of 20413279 in words is "twenty million, four hundred thirteen thousand, two hundred seventy-nine".