29942911521 has 16 divisors (see below), whose sum is σ = 44364640320. Its totient is φ = 19959793920.

The previous prime is 29942911519. The next prime is 29942911541. The reversal of 29942911521 is 12511924992.

29942911521 is a `hidden beast` number, since 2 + 9 + 94 + 29 + 11 + 521 = 666.

It is not a de Polignac number, because 29942911521 - 2¹ = 29942911519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29942911541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219841 + ... + 328961.

It is an arithmetic number, because the mean of its divisors is an integer number (2772790020).

Almost surely, 2^29942911521 is an apocalyptic number.

It is an amenable number.

29942911521 is a deficient number, since it is larger than the sum of its proper divisors (14421728799).

29942911521 is a wasteful number, since it uses less digits than its factorization.

29942911521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119293 (or 119287 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The spelling of 29942911521 in words is "twenty-nine billion, nine hundred forty-two million, nine hundred eleven thousand, five hundred twenty-one".