20207309535 has 24 divisors (see below), whose sum is σ = 40029718560. Its totient is φ = 9237627072.

The previous prime is 20207309497. The next prime is 20207309567. The reversal of 20207309535 is 53590370202.

It is not a de Polignac number, because 20207309535 - 2⁷ = 20207309407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20207309535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32074780 + ... + 32075409.

It is an arithmetic number, because the mean of its divisors is an integer number (1667904940).

Almost surely, 2^20207309535 is an apocalyptic number.

20207309535 is a deficient number, since it is larger than the sum of its proper divisors (19822409025).

20207309535 is a wasteful number, since it uses less digits than its factorization.

20207309535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64150207 (or 64150204 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

Adding to 20207309535 its reverse (53590370202), we get a palindrome (73797679737).

The spelling of 20207309535 in words is "twenty billion, two hundred seven million, three hundred nine thousand, five hundred thirty-five".