18759685157 has 4 divisors (see below), whose sum is σ = 18945424716. Its totient is φ = 18573945600.

The previous prime is 18759685099. The next prime is 18759685171. The reversal of 18759685157 is 75158695781.

It is a Cunningham number, because it is equal to 136966²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18024136516 + 735548641 = 134254^2 + 27121^2 .

It is a cyclic number.

It is not a de Polignac number, because 18759685157 - 2⁸ = 18759684901 is a prime.

It is a super-2 number, since 2×18759685157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18759685157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18759685187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92869628 + ... + 92869829.

It is an arithmetic number, because the mean of its divisors is an integer number (4736356179).

Almost surely, 2^18759685157 is an apocalyptic number.

It is an amenable number.

18759685157 is a deficient number, since it is larger than the sum of its proper divisors (185739559).

18759685157 is a wasteful number, since it uses less digits than its factorization.

18759685157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185739558.

The product of its digits is 21168000, while the sum is 62.

The spelling of 18759685157 in words is "eighteen billion, seven hundred fifty-nine million, six hundred eighty-five thousand, one hundred fifty-seven".