29921366245 has 4 divisors (see below), whose sum is σ = 35905639500. Its totient is φ = 23937092992.

The previous prime is 29921366207. The next prime is 29921366297. The reversal of 29921366245 is 54266312992.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22337394849 + 7583971396 = 149457^2 + 87086^2 .

It is a cyclic number.

It is not a de Polignac number, because 29921366245 - 2¹⁹ = 29920841957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2992136620 + ... + 2992136629.

It is an arithmetic number, because the mean of its divisors is an integer number (8976409875).

Almost surely, 2^29921366245 is an apocalyptic number.

It is an amenable number.

29921366245 is a deficient number, since it is larger than the sum of its proper divisors (5984273255).

29921366245 is an equidigital number, since it uses as much as digits as its factorization.

29921366245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984273254.

The product of its digits is 1399680, while the sum is 49.

The spelling of 29921366245 in words is "twenty-nine billion, nine hundred twenty-one million, three hundred sixty-six thousand, two hundred forty-five".