19764994 has 8 divisors (see below), whose sum is σ = 29844288. Its totient is φ = 9816900.

The previous prime is 19764989. The next prime is 19765013. The reversal of 19764994 is 49946791.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32422 + ... + 33025.

It is an arithmetic number, because the mean of its divisors is an integer number (3730536).

Almost surely, 2^19764994 is an apocalyptic number.

19764994 is a deficient number, since it is larger than the sum of its proper divisors (10079294).

19764994 is a wasteful number, since it uses less digits than its factorization.

19764994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65600.

The product of its digits is 489888, while the sum is 49.

The square root of 19764994 is about 4445.7838453978. The cubic root of 19764994 is about 270.3743960123.

The spelling of 19764994 in words is "nineteen million, seven hundred sixty-four thousand, nine hundred ninety-four".