2138850123 has 16 divisors (see below), whose sum is σ = 2904800640. Its totient is φ = 1399477824.

The previous prime is 2138850107. The next prime is 2138850127. The reversal of 2138850123 is 3210588312.

It is not a de Polignac number, because 2138850123 - 2⁴ = 2138850107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2138850127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104415 + ... + 123207.

It is an arithmetic number, because the mean of its divisors is an integer number (181550040).

Almost surely, 2^2138850123 is an apocalyptic number.

2138850123 is a deficient number, since it is larger than the sum of its proper divisors (765950517).

2138850123 is a wasteful number, since it uses less digits than its factorization.

2138850123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19498.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2138850123 is about 46247.7039754408. The cubic root of 2138850123 is about 1288.4278913690.

The spelling of 2138850123 in words is "two billion, one hundred thirty-eight million, eight hundred fifty thousand, one hundred twenty-three".