29991677918 has 8 divisors (see below), whose sum is σ = 45236067240. Its totient is φ = 14912988840.

The previous prime is 29991677887. The next prime is 29991677951. The reversal of 29991677918 is 81977619992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41424608 + ... + 41425331.

It is an arithmetic number, because the mean of its divisors is an integer number (5654508405).

Almost surely, 2^29991677918 is an apocalyptic number.

29991677918 is a deficient number, since it is larger than the sum of its proper divisors (15244389322).

29991677918 is a wasteful number, since it uses less digits than its factorization.

29991677918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82850122.

The product of its digits is 30862944, while the sum is 68.

The spelling of 29991677918 in words is "twenty-nine billion, nine hundred ninety-one million, six hundred seventy-seven thousand, nine hundred eighteen".