20385320026 has 16 divisors (see below), whose sum is σ = 31929920064. Its totient is φ = 9742637344.

The previous prime is 20385320023. The next prime is 20385320027. The reversal of 20385320026 is 62002358302.

It is a super-2 number, since 2×20385320026² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20385320026.

It is not an unprimeable number, because it can be changed into a prime (20385320023) by changing a digit.

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, 89635 + ... + 220918.

It is an arithmetic number, because the mean of its divisors is an integer number (1995620004).

Almost surely, 2^20385320026 is an apocalyptic number.

20385320026 is a deficient number, since it is larger than the sum of its proper divisors (11544600038).

20385320026 is a wasteful number, since it uses less digits than its factorization.

20385320026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312005.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 20385320026 its reverse (62002358302), we get a palindrome (82387678328).

The spelling of 20385320026 in words is "twenty billion, three hundred eighty-five million, three hundred twenty thousand, twenty-six".