20407317235 has 8 divisors (see below), whose sum is σ = 24615666720. Its totient is φ = 16241263104.

The previous prime is 20407317193. The next prime is 20407317269. The reversal of 20407317235 is 53271370402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20407317235 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20407317235.

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 7 ways as a sum of consecutive naturals, for example, 10572775 + ... + 10574704.

It is an arithmetic number, because the mean of its divisors is an integer number (3076958340).

Almost surely, 2^20407317235 is an apocalyptic number.

20407317235 is a deficient number, since it is larger than the sum of its proper divisors (4208349485).

20407317235 is a wasteful number, since it uses less digits than its factorization.

20407317235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21147677.

The product of its (nonzero) digits is 35280, while the sum is 34.

Adding to 20407317235 its reverse (53271370402), we get a palindrome (73678687637).

The spelling of 20407317235 in words is "twenty billion, four hundred seven million, three hundred seventeen thousand, two hundred thirty-five".