20426069 has 2 divisors, whose sum is σ = 20426070. Its totient is φ = 20426068.

The previous prime is 20426039. The next prime is 20426099. The reversal of 20426069 is 96062402.

It is a balanced prime because it is at equal distance from previous prime (20426039) and next prime (20426099).

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 131044 = 4505^2 + 362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20426069 is a prime.

It is a super-2 number, since 2×20426069² = 834448589585522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20426009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213034 + 10213035.

It is an arithmetic number, because the mean of its divisors is an integer number (10213035).

Almost surely, 2^20426069 is an apocalyptic number.

It is an amenable number.

20426069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426069 is an equidigital number, since it uses as much as digits as its factorization.

20426069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20426069 is about 4519.5208816865. The cubic root of 20426069 is about 273.3557822464.

The spelling of 20426069 in words is "twenty million, four hundred twenty-six thousand, sixty-nine".