2194757138 has 12 divisors (see below), whose sum is σ = 3829627422. Its totient is φ = 940610160.

The previous prime is 2194757119. The next prime is 2194757141. The reversal of 2194757138 is 8317574912.

It can be written as a sum of positive squares in only one way, i.e., 1407225169 + 787531969 = 37513^2 + 28063^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2194757092 and 2194757101.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11197643 + ... + 11197838.

Almost surely, 2^2194757138 is an apocalyptic number.

2194757138 is a deficient number, since it is larger than the sum of its proper divisors (1634870284).

2194757138 is a wasteful number, since it uses less digits than its factorization.

2194757138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22395497 (or 22395490 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The square root of 2194757138 is about 46848.2351641980. The cubic root of 2194757138 is about 1299.5574702840.

The spelling of 2194757138 in words is "two billion, one hundred ninety-four million, seven hundred fifty-seven thousand, one hundred thirty-eight".