29181916193 has 2 divisors, whose sum is σ = 29181916194. Its totient is φ = 29181916192.

The previous prime is 29181916147. The next prime is 29181916199. The reversal of 29181916193 is 39161918192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28923124624 + 258791569 = 170068^2 + 16087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29181916193 is a prime.

It is a super-2 number, since 2×29181916193² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29181916199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14590958096 + 14590958097.

It is an arithmetic number, because the mean of its divisors is an integer number (14590958097).

Almost surely, 2^29181916193 is an apocalyptic number.

It is an amenable number.

29181916193 is a deficient number, since it is larger than the sum of its proper divisors (1).

29181916193 is an equidigital number, since it uses as much as digits as its factorization.

29181916193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 50.

The spelling of 29181916193 in words is "twenty-nine billion, one hundred eighty-one million, nine hundred sixteen thousand, one hundred ninety-three".