2139458194 has 16 divisors (see below), whose sum is σ = 3445825536. Its totient is φ = 992622400.

The previous prime is 2139458173. The next prime is 2139458203. The reversal of 2139458194 is 4918549312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440722 + ... + 445549.

It is an arithmetic number, because the mean of its divisors is an integer number (215364096).

Almost surely, 2^2139458194 is an apocalyptic number.

2139458194 is a deficient number, since it is larger than the sum of its proper divisors (1306367342).

2139458194 is a wasteful number, since it uses less digits than its factorization.

2139458194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886361.

The product of its digits is 311040, while the sum is 46.

The square root of 2139458194 is about 46254.2775751605. The cubic root of 2139458194 is about 1288.5499789953.

The spelling of 2139458194 in words is "two billion, one hundred thirty-nine million, four hundred fifty-eight thousand, one hundred ninety-four".