20385505368718 has 32 divisors (see below), whose sum is σ = 36074523598848. Its totient is φ = 8454669321600.

The previous prime is 20385505368703. The next prime is 20385505368721. The reversal of 20385505368718 is 81786350558302.

It is a super-2 number, since 2×20385505368718² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26303398 + ... + 27067318.

It is an arithmetic number, because the mean of its divisors is an integer number (1127328862464).

Almost surely, 2^{20385505368718} is an apocalyptic number.

20385505368718 is a deficient number, since it is larger than the sum of its proper divisors (15689018230130).

20385505368718 is a wasteful number, since it uses less digits than its factorization.

20385505368718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825448.

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 20385505368718 in words is "twenty trillion, three hundred eighty-five billion, five hundred five million, three hundred sixty-eight thousand, seven hundred eighteen".