20255399 has 2 divisors, whose sum is σ = 20255400. Its totient is φ = 20255398.

The previous prime is 20255393. The next prime is 20255413. The reversal of 20255399 is 99355202.

20255399 is nontrivially palindromic in base 7.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20255399 - 2¹² = 20251303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20255393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10127699 + 10127700.

It is an arithmetic number, because the mean of its divisors is an integer number (10127700).

Almost surely, 2^20255399 is an apocalyptic number.

20255399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20255399 is an equidigital number, since it uses as much as digits as its factorization.

20255399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 20255399 is about 4500.5998489090. The cubic root of 20255399 is about 272.5923105602.

The spelling of 20255399 in words is "twenty million, two hundred fifty-five thousand, three hundred ninety-nine".