29729938217 has 12 divisors (see below), whose sum is σ = 34795985616. Its totient is φ = 25326461160.

The previous prime is 29729938211. The next prime is 29729938237. The reversal of 29729938217 is 71283992792.

It is a de Polignac number, because none of the positive numbers 2^k-29729938217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29729938211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1853159 + ... + 1869132.

It is an arithmetic number, because the mean of its divisors is an integer number (2899665468).

Almost surely, 2^29729938217 is an apocalyptic number.

It is an amenable number.

29729938217 is a deficient number, since it is larger than the sum of its proper divisors (5066047399).

29729938217 is a wasteful number, since it uses less digits than its factorization.

29729938217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722468 (or 3722461 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 59.

The spelling of 29729938217 in words is "twenty-nine billion, seven hundred twenty-nine million, nine hundred thirty-eight thousand, two hundred seventeen".