1945370018 has 4 divisors (see below), whose sum is σ = 2918055030. Its totient is φ = 972685008.

The previous prime is 1945369957. The next prime is 1945370033. The reversal of 1945370018 is 8100735491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8100735491 = 311 ⋅26047381.

It can be written as a sum of positive squares in only one way, i.e., 1503655729 + 441714289 = 38777^2 + 21017^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486342503 + ... + 486342506.

Almost surely, 2^1945370018 is an apocalyptic number.

1945370018 is a deficient number, since it is larger than the sum of its proper divisors (972685012).

1945370018 is an equidigital number, since it uses as much as digits as its factorization.

1945370018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972685011.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1945370018 is about 44106.3489534103. The cubic root of 1945370018 is about 1248.3434093759.

The spelling of 1945370018 in words is "one billion, nine hundred forty-five million, three hundred seventy thousand, eighteen".