18870245071 has 2 divisors, whose sum is σ = 18870245072. Its totient is φ = 18870245070.

The previous prime is 18870245063. The next prime is 18870245081. The reversal of 18870245071 is 17054207881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18870245071 - 2³ = 18870245063 is a prime.

It is a super-2 number, since 2×18870245071² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18870245041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9435122535 + 9435122536.

It is an arithmetic number, because the mean of its divisors is an integer number (9435122536).

Almost surely, 2^18870245071 is an apocalyptic number.

18870245071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18870245071 is an equidigital number, since it uses as much as digits as its factorization.

18870245071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 43.

The spelling of 18870245071 in words is "eighteen billion, eight hundred seventy million, two hundred forty-five thousand, seventy-one".