29820718905 has 24 divisors (see below), whose sum is σ = 47981966592. Its totient is φ = 15815277216.

The previous prime is 29820718891. The next prime is 29820718933. The reversal of 29820718905 is 50981702892.

It is not a de Polignac number, because 29820718905 - 2⁶ = 29820718841 is a prime.

It is a super-2 number, since 2×29820718905² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449592 + ... + 511638.

It is an arithmetic number, because the mean of its divisors is an integer number (1999248608).

Almost surely, 2^29820718905 is an apocalyptic number.

It is an amenable number.

29820718905 is a deficient number, since it is larger than the sum of its proper divisors (18161247687).

29820718905 is an equidigital number, since it uses as much as digits as its factorization.

29820718905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62413 (or 62234 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 29820718905 in words is "twenty-nine billion, eight hundred twenty million, seven hundred eighteen thousand, nine hundred five".