19671994 has 8 divisors (see below), whose sum is σ = 29603808. Its totient is φ = 9804060.

The previous prime is 19671983. The next prime is 19671997. The reversal of 19671994 is 49917691.

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

It is not an unprimeable number, because it can be changed into a prime (19671997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15192 + ... + 16435.

It is an arithmetic number, because the mean of its divisors is an integer number (3700476).

Almost surely, 2^19671994 is an apocalyptic number.

19671994 is a deficient number, since it is larger than the sum of its proper divisors (9931814).

19671994 is a wasteful number, since it uses less digits than its factorization.

19671994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31940.

The product of its digits is 122472, while the sum is 46.

The square root of 19671994 is about 4435.3121648876. The cubic root of 19671994 is about 269.9496659716.

The spelling of 19671994 in words is "nineteen million, six hundred seventy-one thousand, nine hundred ninety-four".