20535469 has 2 divisors, whose sum is σ = 20535470. Its totient is φ = 20535468.

The previous prime is 20535461. The next prime is 20535479. The reversal of 20535469 is 96453502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 1060900 = 4413^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 20535469 - 2³ = 20535461 is a prime.

It is a super-3 number, since 3×20535469³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20535461) 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, 10267734 + 10267735.

It is an arithmetic number, because the mean of its divisors is an integer number (10267735).

Almost surely, 2^20535469 is an apocalyptic number.

It is an amenable number.

20535469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535469 is an equidigital number, since it uses as much as digits as its factorization.

20535469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 20535469 is about 4531.6077720827. The cubic root of 20535469 is about 273.8429357176.

The spelling of 20535469 in words is "twenty million, five hundred thirty-five thousand, four hundred sixty-nine".