29308990185 has 20 divisors (see below), whose sum is σ = 52539079428. Its totient is φ = 15631461216.

The previous prime is 29308990177. The next prime is 29308990187. The reversal of 29308990185 is 58109980392.

It can be written as a sum of positive squares in 2 ways, for example, as 3376074816 + 25932915369 = 58104^2 + 161037^2 .

It is not a de Polignac number, because 29308990185 - 2³ = 29308990177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29308990187) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36183534 + ... + 36184343.

Almost surely, 2^29308990185 is an apocalyptic number.

It is an amenable number.

29308990185 is a deficient number, since it is larger than the sum of its proper divisors (23230089243).

29308990185 is an equidigital number, since it uses as much as digits as its factorization.

29308990185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72367894 (or 72367885 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 29308990185 in words is "twenty-nine billion, three hundred eight million, nine hundred ninety thousand, one hundred eighty-five".