1994081994 has 12 divisors (see below), whose sum is σ = 4320511026. Its totient is φ = 664693992.

The previous prime is 1994081993. The next prime is 1994082001. The reversal of 1994081994 is 4991804991.

It can be written as a sum of positive squares in only one way, i.e., 1943487225 + 50594769 = 44085^2 + 7113^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1994081994.

It is not an unprimeable number, because it can be changed into a prime (1994081993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55391149 + ... + 55391184.

Almost surely, 2^1994081994 is an apocalyptic number.

1994081994 is an abundant number, since it is smaller than the sum of its proper divisors (2326429032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1994081994 is a wasteful number, since it uses less digits than its factorization.

1994081994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110782341 (or 110782338 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 1994081994 is about 44655.1452130659. The cubic root of 1994081994 is about 1258.6771187661.

The spelling of 1994081994 in words is "one billion, nine hundred ninety-four million, eighty-one thousand, nine hundred ninety-four".