18717895701 has 12 divisors (see below), whose sum is σ = 27767689612. Its totient is φ = 12141337536.

The previous prime is 18717895699. The next prime is 18717895723. The reversal of 18717895701 is 10759871781.

It can be written as a sum of positive squares in 2 ways, for example, as 18091595025 + 626300676 = 134505^2 + 25026^2 .

It is not a de Polignac number, because 18717895701 - 2¹ = 18717895699 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 (18717895741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28104616 + ... + 28105281.

Almost surely, 2^18717895701 is an apocalyptic number.

It is an amenable number.

18717895701 is a deficient number, since it is larger than the sum of its proper divisors (9049793911).

18717895701 is a wasteful number, since it uses less digits than its factorization.

18717895701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56209940 (or 56209937 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 54.

The spelling of 18717895701 in words is "eighteen billion, seven hundred seventeen million, eight hundred ninety-five thousand, seven hundred one".