29921366243 has 4 divisors (see below), whose sum is σ = 30156967680. Its totient is φ = 29685764808.

The previous prime is 29921366207. The next prime is 29921366297. The reversal of 29921366243 is 34266312992.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29921366243 - 2¹⁴ = 29921349859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29921306243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117800528 + ... + 117800781.

It is an arithmetic number, because the mean of its divisors is an integer number (7539241920).

Almost surely, 2^29921366243 is an apocalyptic number.

29921366243 is a deficient number, since it is larger than the sum of its proper divisors (235601437).

29921366243 is a wasteful number, since it uses less digits than its factorization.

29921366243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235601436.

The product of its digits is 839808, while the sum is 47.

The spelling of 29921366243 in words is "twenty-nine billion, nine hundred twenty-one million, three hundred sixty-six thousand, two hundred forty-three".