20228839 has 2 divisors, whose sum is σ = 20228840. Its totient is φ = 20228838.

The previous prime is 20228807. The next prime is 20228849. The reversal of 20228839 is 93882202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20228839 - 2⁵ = 20228807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20228849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10114419 + 10114420.

It is an arithmetic number, because the mean of its divisors is an integer number (10114420).

Almost surely, 2^20228839 is an apocalyptic number.

20228839 is a deficient number, since it is larger than the sum of its proper divisors (1).

20228839 is an equidigital number, since it uses as much as digits as its factorization.

20228839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20228839 is about 4497.6481632071. The cubic root of 20228839 is about 272.4731124047.

The spelling of 20228839 in words is "twenty million, two hundred twenty-eight thousand, eight hundred thirty-nine".