18702070187 has 4 divisors (see below), whose sum is σ = 18704012496. Its totient is φ = 18700127880.

The previous prime is 18702070171. The next prime is 18702070193. The reversal of 18702070187 is 78107020781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78107020781 = 1637 ⋅47713513.

It is a cyclic number.

It is not a de Polignac number, because 18702070187 - 2⁴ = 18702070171 is a prime.

It is a super-4 number, since 4×18702070187⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18702070117) 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, 956639 + ... + 975992.

It is an arithmetic number, because the mean of its divisors is an integer number (4676003124).

Almost surely, 2^18702070187 is an apocalyptic number.

18702070187 is a deficient number, since it is larger than the sum of its proper divisors (1942309).

18702070187 is an equidigital number, since it uses as much as digits as its factorization.

18702070187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942308.

The product of its (nonzero) digits is 43904, while the sum is 41.

The spelling of 18702070187 in words is "eighteen billion, seven hundred two million, seventy thousand, one hundred eighty-seven".