29181918249 has 32 divisors (see below), whose sum is σ = 47176550400. Its totient is φ = 17680816080.

The previous prime is 29181918217. The next prime is 29181918301. The reversal of 29181918249 is 94281918192.

It is not a de Polignac number, because 29181918249 - 2⁵ = 29181918217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29181918195 and 29181918204.

It is not an unprimeable number, because it can be changed into a prime (29181998249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1158612 + ... + 1183530.

It is an arithmetic number, because the mean of its divisors is an integer number (1474267200).

Almost surely, 2^29181918249 is an apocalyptic number.

It is an amenable number.

29181918249 is a deficient number, since it is larger than the sum of its proper divisors (17994632151).

29181918249 is a wasteful number, since it uses less digits than its factorization.

29181918249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28882 (or 28876 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The spelling of 29181918249 in words is "twenty-nine billion, one hundred eighty-one million, nine hundred eighteen thousand, two hundred forty-nine".