20735069 has 2 divisors, whose sum is σ = 20735070. Its totient is φ = 20735068.

The previous prime is 20735041. The next prime is 20735081. The reversal of 20735069 is 96053702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17530969 + 3204100 = 4187^2 + 1790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20735069 is a prime.

It is a super-2 number, since 2×20735069² = 859886172869522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20735009) 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, 10367534 + 10367535.

It is an arithmetic number, because the mean of its divisors is an integer number (10367535).

Almost surely, 2^20735069 is an apocalyptic number.

It is an amenable number.

20735069 is a deficient number, since it is larger than the sum of its proper divisors (1).

20735069 is an equidigital number, since it uses as much as digits as its factorization.

20735069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20735069 is about 4553.5776044776. The cubic root of 20735069 is about 274.7273065426.

The spelling of 20735069 in words is "twenty million, seven hundred thirty-five thousand, sixty-nine".