20005071738782 has 16 divisors (see below), whose sum is σ = 33430225983840. Its totient is φ = 8914726928352.

The previous prime is 20005071738767. The next prime is 20005071738797. The reversal of 20005071738782 is 28783717050002.

It is an interprime number because it is at equal distance from previous prime (20005071738767) and next prime (20005071738797).

It is a self number, because there is not a number n which added to its sum of digits gives 20005071738782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13265961938 + ... + 13265963445.

It is an arithmetic number, because the mean of its divisors is an integer number (2089389123990).

Almost surely, 2^{20005071738782} is an apocalyptic number.

20005071738782 is a deficient number, since it is larger than the sum of its proper divisors (13425154245058).

20005071738782 is a wasteful number, since it uses less digits than its factorization.

20005071738782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26531925427.

The product of its (nonzero) digits is 1317120, while the sum is 50.

Adding to 20005071738782 its reverse (28783717050002), we get a palindrome (48788788788784).

The spelling of 20005071738782 in words is "twenty trillion, five billion, seventy-one million, seven hundred thirty-eight thousand, seven hundred eighty-two".