20018122867 has 2 divisors, whose sum is σ = 20018122868. Its totient is φ = 20018122866.

The previous prime is 20018122783. The next prime is 20018122907. The reversal of 20018122867 is 76822181002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20018122867 is a prime.

It is not a weakly prime, because it can be changed into another prime (20018122667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009061433 + 10009061434.

It is an arithmetic number, because the mean of its divisors is an integer number (10009061434).

Almost surely, 2^20018122867 is an apocalyptic number.

20018122867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20018122867 is an equidigital number, since it uses as much as digits as its factorization.

20018122867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 20018122867 in words is "twenty billion, eighteen million, one hundred twenty-two thousand, eight hundred sixty-seven".