20751341565 has 16 divisors (see below), whose sum is σ = 34273184256. Its totient is φ = 10710369600.

The previous prime is 20751341561. The next prime is 20751341593. The reversal of 20751341565 is 56514315702.

It is not a de Polignac number, because 20751341565 - 2² = 20751341561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751341561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22312806 + ... + 22313735.

It is an arithmetic number, because the mean of its divisors is an integer number (2142074016).

Almost surely, 2^20751341565 is an apocalyptic number.

It is an amenable number.

20751341565 is a deficient number, since it is larger than the sum of its proper divisors (13521842691).

20751341565 is a wasteful number, since it uses less digits than its factorization.

20751341565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44626580.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 20751341565 in words is "twenty billion, seven hundred fifty-one million, three hundred forty-one thousand, five hundred sixty-five".