20535499 has 2 divisors, whose sum is σ = 20535500. Its totient is φ = 20535498.

The previous prime is 20535479. The next prime is 20535503. The reversal of 20535499 is 99453502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20535499 - 2¹¹ = 20533451 is a prime.

It is not a weakly prime, because it can be changed into another prime (20535469) 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, 10267749 + 10267750.

It is an arithmetic number, because the mean of its divisors is an integer number (10267750).

Almost surely, 2^20535499 is an apocalyptic number.

20535499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535499 is an equidigital number, since it uses as much as digits as its factorization.

20535499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 20535499 is about 4531.6110821649. The cubic root of 20535499 is about 273.8430690687.

The spelling of 20535499 in words is "twenty million, five hundred thirty-five thousand, four hundred ninety-nine".