29895316810921 has 3 divisors (see below), whose sum is σ = 29895322278583. Its totient is φ = 29895311343260.

The previous prime is 29895316810867. The next prime is 29895316810973. The reversal of 29895316810921 is 12901861359892.

The square root of 29895316810921 is 5467661.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 17375466855321 + 12519849955600 = 4168389^2 + 3538340^2 .

It is not a de Polignac number, because 29895316810921 - 2¹¹ = 29895316808873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29895316810421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2733831 + ... + 8201491.

Almost surely, 2^{29895316810921} is an apocalyptic number.

29895316810921 is the 5467661-st square number.

29895316810921 is the 2733831-st centered octagonal number.

It is an amenable number.

29895316810921 is a deficient number, since it is larger than the sum of its proper divisors (5467662).

29895316810921 is an frugal number, since it uses more digits than its factorization.

29895316810921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10935322 (or 5467661 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 64.

The spelling of 29895316810921 in words is "twenty-nine trillion, eight hundred ninety-five billion, three hundred sixteen million, eight hundred ten thousand, nine hundred twenty-one".