29207994818 has 6 divisors (see below), whose sum is σ = 43812354771. Its totient is φ = 14603876562.

The previous prime is 29207994817. The next prime is 29207994859. The reversal of 29207994818 is 81849970292.

It can be written as a sum of positive squares in only one way, i.e., 14603997409 + 14603997409 = 120847^2 + 120847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=120847.

It is a super-2 number, since 2×29207994818² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29207994817) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 181271 + ... + 302117.

Almost surely, 2^29207994818 is an apocalyptic number.

29207994818 is a deficient number, since it is larger than the sum of its proper divisors (14604359953).

29207994818 is an frugal number, since it uses more digits than its factorization.

29207994818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241696 (or 120849 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 29207994818 in words is "twenty-nine billion, two hundred seven million, nine hundred ninety-four thousand, eight hundred eighteen".