19425642 has 8 divisors (see below), whose sum is σ = 38851296. Its totient is φ = 6475212.

The previous prime is 19425599. The next prime is 19425647. The reversal of 19425642 is 24652491.

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

19425642 is an admirable number.

It is a super-2 number, since 2×19425642² = 754711134224328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (19425647) by changing a digit.

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, 1618798 + ... + 1618809.

It is an arithmetic number, because the mean of its divisors is an integer number (4856412).

Almost surely, 2^19425642 is an apocalyptic number.

19425642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19425642 is a wasteful number, since it uses less digits than its factorization.

19425642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237612.

The product of its digits is 17280, while the sum is 33.

The square root of 19425642 is about 4407.4530059888. The cubic root of 19425642 is about 268.8180709489.

The spelling of 19425642 in words is "nineteen million, four hundred twenty-five thousand, six hundred forty-two".