29820670849 has 4 divisors (see below), whose sum is σ = 30626634964. Its totient is φ = 29014706736.

The previous prime is 29820670843. The next prime is 29820670883. The reversal of 29820670849 is 94807602892.

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 16885703025 + 12934967824 = 129945^2 + 113732^2 .

It is a cyclic number.

It is not a de Polignac number, because 29820670849 - 2⁹ = 29820670337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29820670849.

It is not an unprimeable number, because it can be changed into a prime (29820670843) 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, 402982002 + ... + 402982075.

It is an arithmetic number, because the mean of its divisors is an integer number (7656658741).

Almost surely, 2^29820670849 is an apocalyptic number.

It is an amenable number.

29820670849 is a deficient number, since it is larger than the sum of its proper divisors (805964115).

29820670849 is an equidigital number, since it uses as much as digits as its factorization.

29820670849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805964114.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 29820670849 in words is "twenty-nine billion, eight hundred twenty million, six hundred seventy thousand, eight hundred forty-nine".