18969729127 has 2 divisors, whose sum is σ = 18969729128. Its totient is φ = 18969729126.

The previous prime is 18969729109. The next prime is 18969729151. The reversal of 18969729127 is 72192796981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18969729127 - 2²⁷ = 18835511399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18969729167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484864563 + 9484864564.

It is an arithmetic number, because the mean of its divisors is an integer number (9484864564).

Almost surely, 2^18969729127 is an apocalyptic number.

18969729127 is a deficient number, since it is larger than the sum of its proper divisors (1).

18969729127 is an equidigital number, since it uses as much as digits as its factorization.

18969729127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 61.

The spelling of 18969729127 in words is "eighteen billion, nine hundred sixty-nine million, seven hundred twenty-nine thousand, one hundred twenty-seven".