2145141994 has 8 divisors (see below), whose sum is σ = 3231523620. Its totient is φ = 1067967456.

The previous prime is 2145141979. The next prime is 2145142039. The reversal of 2145141994 is 4991415412.

It can be written as a sum of positive squares in 2 ways, for example, as 1747658025 + 397483969 = 41805^2 + 19937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2301189 + ... + 2302120.

Almost surely, 2^2145141994 is an apocalyptic number.

2145141994 is a deficient number, since it is larger than the sum of its proper divisors (1086381626).

2145141994 is a wasteful number, since it uses less digits than its factorization.

2145141994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4603544.

The product of its digits is 51840, while the sum is 40.

The square root of 2145141994 is about 46315.6776264798. The cubic root of 2145141994 is about 1289.6900471197.

The spelling of 2145141994 in words is "two billion, one hundred forty-five million, one hundred forty-one thousand, nine hundred ninety-four".