19425994 has 8 divisors (see below), whose sum is σ = 33301728. Its totient is φ = 8325420.

The previous prime is 19425971. The next prime is 19426003. The reversal of 19425994 is 49952491.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19425994.

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, 693772 + ... + 693799.

It is an arithmetic number, because the mean of its divisors is an integer number (4162716).

Almost surely, 2^19425994 is an apocalyptic number.

19425994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19425994 is a deficient number, since it is larger than the sum of its proper divisors (13875734).

19425994 is a wasteful number, since it uses less digits than its factorization.

19425994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387580.

The product of its digits is 116640, while the sum is 43.

The square root of 19425994 is about 4407.4929381679. The cubic root of 19425994 is about 268.8196946342.

The spelling of 19425994 in words is "nineteen million, four hundred twenty-five thousand, nine hundred ninety-four".