29997933596821 has 8 divisors (see below), whose sum is σ = 31580722920320. Its totient is φ = 28415539344672.

The previous prime is 29997933596819. The next prime is 29997933596861. The reversal of 29997933596821 is 12869533979992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29997933596821 - 2¹ = 29997933596819 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 (29997933596801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98611965 + ... + 98915698.

It is an arithmetic number, because the mean of its divisors is an integer number (3947590365040).

Almost surely, 2^{29997933596821} is an apocalyptic number.

It is an amenable number.

29997933596821 is a deficient number, since it is larger than the sum of its proper divisors (1582789323499).

29997933596821 is a wasteful number, since it uses less digits than its factorization.

29997933596821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197535675.

The product of its digits is 3571283520, while the sum is 82.

The spelling of 29997933596821 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred thirty-three million, five hundred ninety-six thousand, eight hundred twenty-one".