19442870 has 8 divisors (see below), whose sum is σ = 34997184. Its totient is φ = 7777144.

The previous prime is 19442869. The next prime is 19442881. The reversal of 19442870 is 7824491.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19442870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972134 + ... + 972153.

It is an arithmetic number, because the mean of its divisors is an integer number (4374648).

Almost surely, 2^19442870 is an apocalyptic number.

19442870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19442870 is a deficient number, since it is larger than the sum of its proper divisors (15554314).

19442870 is a wasteful number, since it uses less digits than its factorization.

19442870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944294.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 19442870 is about 4409.4069896076. The cubic root of 19442870 is about 268.8975162736.

The spelling of 19442870 in words is "nineteen million, four hundred forty-two thousand, eight hundred seventy".