1993944454 has 16 divisors (see below), whose sum is σ = 3042055296. Its totient is φ = 979948800.

The previous prime is 1993944439. The next prime is 1993944457. The reversal of 1993944454 is 4544493991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993944457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202219 + ... + 211849.

It is an arithmetic number, because the mean of its divisors is an integer number (190128456).

Almost surely, 2^1993944454 is an apocalyptic number.

1993944454 is a deficient number, since it is larger than the sum of its proper divisors (1048110842).

1993944454 is a wasteful number, since it uses less digits than its factorization.

1993944454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391.

The product of its digits is 2799360, while the sum is 52.

The square root of 1993944454 is about 44653.6051624054. The cubic root of 1993944454 is about 1258.6481793959.

The spelling of 1993944454 in words is "one billion, nine hundred ninety-three million, nine hundred forty-four thousand, four hundred fifty-four".