18879947027 has 2 divisors, whose sum is σ = 18879947028. Its totient is φ = 18879947026.

The previous prime is 18879947011. The next prime is 18879947029. The reversal of 18879947027 is 72074997881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18879947027 - 2⁴ = 18879947011 is a prime.

It is a super-2 number, since 2×18879947027² (a number of 21 digits) contains 22 as substring.

Together with 18879947029, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18879947029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9439973513 + 9439973514.

It is an arithmetic number, because the mean of its divisors is an integer number (9439973514).

Almost surely, 2^18879947027 is an apocalyptic number.

18879947027 is a deficient number, since it is larger than the sum of its proper divisors (1).

18879947027 is an equidigital number, since it uses as much as digits as its factorization.

18879947027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14224896, while the sum is 62.

The spelling of 18879947027 in words is "eighteen billion, eight hundred seventy-nine million, nine hundred forty-seven thousand, twenty-seven".