20167911349 has 2 divisors, whose sum is σ = 20167911350. Its totient is φ = 20167911348.

The previous prime is 20167911347. The next prime is 20167911383. The reversal of 20167911349 is 94311976102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18876012100 + 1291899249 = 137390^2 + 35943^2 .

It is a cyclic number.

It is not a de Polignac number, because 20167911349 - 2¹ = 20167911347 is a prime.

It is a super-2 number, since 2×20167911349² (a number of 21 digits) contains 22 as substring.

Together with 20167911347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20167911347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10083955674 + 10083955675.

It is an arithmetic number, because the mean of its divisors is an integer number (10083955675).

Almost surely, 2^20167911349 is an apocalyptic number.

It is an amenable number.

20167911349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20167911349 is an equidigital number, since it uses as much as digits as its factorization.

20167911349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 20167911349 in words is "twenty billion, one hundred sixty-seven million, nine hundred eleven thousand, three hundred forty-nine".