20426039 has 2 divisors, whose sum is σ = 20426040. Its totient is φ = 20426038.

The previous prime is 20426017. The next prime is 20426069. The reversal of 20426039 is 93062402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20426039 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20425999 and 20426017.

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, 10213019 + 10213020.

It is an arithmetic number, because the mean of its divisors is an integer number (10213020).

Almost surely, 2^20426039 is an apocalyptic number.

20426039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20426039 is an equidigital number, since it uses as much as digits as its factorization.

20426039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20426039 is about 4519.5175627494. The cubic root of 20426039 is about 273.3556484194.

The spelling of 20426039 in words is "twenty million, four hundred twenty-six thousand, thirty-nine".