18840157071 has 4 divisors (see below), whose sum is σ = 25120209432. Its totient is φ = 12560104712.

The previous prime is 18840157069. The next prime is 18840157073. The reversal of 18840157071 is 17075104881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17075104881 = 3 ⋅5691701627.

It is an interprime number because it is at equal distance from previous prime (18840157069) and next prime (18840157073).

It is a cyclic number.

It is not a de Polignac number, because 18840157071 - 2¹ = 18840157069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18840157073) 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, 3140026176 + ... + 3140026181.

It is an arithmetic number, because the mean of its divisors is an integer number (6280052358).

Almost surely, 2^18840157071 is an apocalyptic number.

18840157071 is a deficient number, since it is larger than the sum of its proper divisors (6280052361).

18840157071 is an equidigital number, since it uses as much as digits as its factorization.

18840157071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280052360.

The product of its (nonzero) digits is 62720, while the sum is 42.

The spelling of 18840157071 in words is "eighteen billion, eight hundred forty million, one hundred fifty-seven thousand, seventy-one".