29997985596823 has 4 divisors (see below), whose sum is σ = 30001570022160. Its totient is φ = 29994401171488.

The previous prime is 29997985596757. The next prime is 29997985596877. The reversal of 29997985596823 is 32869558979992.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29997985596823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997985596883) 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, 1792200115 + ... + 1792216852.

It is an arithmetic number, because the mean of its divisors is an integer number (7500392505540).

Almost surely, 2^{29997985596823} is an apocalyptic number.

29997985596823 is a deficient number, since it is larger than the sum of its proper divisors (3584425337).

29997985596823 is an equidigital number, since it uses as much as digits as its factorization.

29997985596823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584425336.

The product of its digits is 47617113600, while the sum is 91.

The spelling of 29997985596823 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred eighty-five million, five hundred ninety-six thousand, eight hundred twenty-three".