20018372929 has 2 divisors, whose sum is σ = 20018372930. Its totient is φ = 20018372928.

The previous prime is 20018372923. The next prime is 20018372987. The reversal of 20018372929 is 92927381002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11119280704 + 8899092225 = 105448^2 + 94335^2 .

It is a cyclic number.

It is not a de Polignac number, because 20018372929 - 2¹⁵ = 20018340161 is a prime.

It is not a weakly prime, because it can be changed into another prime (20018372923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009186464 + 10009186465.

It is an arithmetic number, because the mean of its divisors is an integer number (10009186465).

Almost surely, 2^20018372929 is an apocalyptic number.

It is an amenable number.

20018372929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20018372929 is an equidigital number, since it uses as much as digits as its factorization.

20018372929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 20018372929 in words is "twenty billion, eighteen million, three hundred seventy-two thousand, nine hundred twenty-nine".