20163465757 has 16 divisors (see below), whose sum is σ = 21624149232. Its totient is φ = 18734284800.

The previous prime is 20163465737. The next prime is 20163465761. The reversal of 20163465757 is 75756436102.

It can be written as a sum of positive squares in 8 ways, for example, as 780978916 + 19382486841 = 27946^2 + 139221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20163465757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163465737) 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, 646003 + ... + 676495.

It is an arithmetic number, because the mean of its divisors is an integer number (1351509327).

Almost surely, 2^20163465757 is an apocalyptic number.

It is an amenable number.

20163465757 is a deficient number, since it is larger than the sum of its proper divisors (1460683475).

20163465757 is a wasteful number, since it uses less digits than its factorization.

20163465757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31008.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 20163465757 in words is "twenty billion, one hundred sixty-three million, four hundred sixty-five thousand, seven hundred fifty-seven".