2138120434 has 8 divisors (see below), whose sum is σ = 3346623360. Its totient is φ = 1022579316.

The previous prime is 2138120431. The next prime is 2138120471. The reversal of 2138120434 is 4340218312.

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

It is not an unprimeable number, because it can be changed into a prime (2138120431) 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 3 ways as a sum of consecutive naturals, for example, 23240394 + ... + 23240485.

It is an arithmetic number, because the mean of its divisors is an integer number (418327920).

Almost surely, 2^2138120434 is an apocalyptic number.

2138120434 is a deficient number, since it is larger than the sum of its proper divisors (1208502926).

2138120434 is a wasteful number, since it uses less digits than its factorization.

2138120434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46480904.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2138120434 is about 46239.8143811153. The cubic root of 2138120434 is about 1288.2813549063.

Adding to 2138120434 its reverse (4340218312), we get a palindrome (6478338746).

The spelling of 2138120434 in words is "two billion, one hundred thirty-eight million, one hundred twenty thousand, four hundred thirty-four".