20275617765 has 16 divisors (see below), whose sum is σ = 34936449408. Its totient is φ = 9981842496.

The previous prime is 20275617743. The next prime is 20275617767. The reversal of 20275617765 is 56771657202.

It is not a de Polignac number, because 20275617765 - 2¹³ = 20275609573 is a prime.

It is a super-2 number, since 2×20275617765² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275617767) 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 15 ways as a sum of consecutive naturals, for example, 51988569 + ... + 51988958.

It is an arithmetic number, because the mean of its divisors is an integer number (2183528088).

Almost surely, 2^20275617765 is an apocalyptic number.

It is an amenable number.

20275617765 is a deficient number, since it is larger than the sum of its proper divisors (14660831643).

20275617765 is a wasteful number, since it uses less digits than its factorization.

20275617765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103977548.

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 20275617765 in words is "twenty billion, two hundred seventy-five million, six hundred seventeen thousand, seven hundred sixty-five".