29823442138 has 8 divisors (see below), whose sum is σ = 51125900832. Its totient is φ = 12781475196.

The previous prime is 29823442133. The next prime is 29823442139. The reversal of 29823442138 is 83124432892.

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

It is a super-2 number, since 2×29823442138² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29823442133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065122920 + ... + 1065122947.

It is an arithmetic number, because the mean of its divisors is an integer number (6390737604).

Almost surely, 2^29823442138 is an apocalyptic number.

29823442138 is a deficient number, since it is larger than the sum of its proper divisors (21302458694).

29823442138 is a wasteful number, since it uses less digits than its factorization.

29823442138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130245876.

The product of its digits is 663552, while the sum is 46.

The spelling of 29823442138 in words is "twenty-nine billion, eight hundred twenty-three million, four hundred forty-two thousand, one hundred thirty-eight".