1994968081 has 8 divisors (see below), whose sum is σ = 2027096864. Its totient is φ = 1962908640.

The previous prime is 1994968051. The next prime is 1994968093. The reversal of 1994968081 is 1808694991.

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

It is a cyclic number.

It is not a de Polignac number, because 1994968081 - 2⁵ = 1994968049 is a prime.

It is a super-2 number, since 2×1994968081² = 7959795288417645122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994968051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42301 + ... + 76021.

It is an arithmetic number, because the mean of its divisors is an integer number (253387108).

Almost surely, 2^1994968081 is an apocalyptic number.

It is an amenable number.

1994968081 is a deficient number, since it is larger than the sum of its proper divisors (32128783).

1994968081 is an equidigital number, since it uses as much as digits as its factorization.

1994968081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34671.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 1994968081 is about 44665.0655546368. The cubic root of 1994968081 is about 1258.8635257241.

The spelling of 1994968081 in words is "one billion, nine hundred ninety-four million, nine hundred sixty-eight thousand, eighty-one".