20293739 has 2 divisors, whose sum is σ = 20293740. Its totient is φ = 20293738.

The previous prime is 20293709. The next prime is 20293771. The reversal of 20293739 is 93739202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20293739 - 2¹⁶ = 20228203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20293699 and 20293708.

It is not a weakly prime, because it can be changed into another prime (20293709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10146869 + 10146870.

It is an arithmetic number, because the mean of its divisors is an integer number (10146870).

Almost surely, 2^20293739 is an apocalyptic number.

20293739 is a deficient number, since it is larger than the sum of its proper divisors (1).

20293739 is an equidigital number, since it uses as much as digits as its factorization.

20293739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 20293739 is about 4504.8572674392. The cubic root of 20293739 is about 272.7641923386.

The spelling of 20293739 in words is "twenty million, two hundred ninety-three thousand, seven hundred thirty-nine".