2138189057 has 4 divisors (see below), whose sum is σ = 2139846576. Its totient is φ = 2136531540.

The previous prime is 2138189033. The next prime is 2138189063. The reversal of 2138189057 is 7509818312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2138189057 - 2⁶ = 2138188993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2138188999 and 2138189017.

It is not an unprimeable number, because it can be changed into a prime (2138189357) 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, 826823 + ... + 829404.

It is an arithmetic number, because the mean of its divisors is an integer number (534961644).

Almost surely, 2^2138189057 is an apocalyptic number.

It is an amenable number.

2138189057 is a deficient number, since it is larger than the sum of its proper divisors (1657519).

2138189057 is a wasteful number, since it uses less digits than its factorization.

2138189057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657518.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 2138189057 is about 46240.5564088496. The cubic root of 2138189057 is about 1288.2951372272.

The spelling of 2138189057 in words is "two billion, one hundred thirty-eight million, one hundred eighty-nine thousand, fifty-seven".