19844494 has 4 divisors (see below), whose sum is σ = 29766744. Its totient is φ = 9922246.

The previous prime is 19844483. The next prime is 19844507. The reversal of 19844494 is 49444891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19844494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4961122 + ... + 4961125.

It is an arithmetic number, because the mean of its divisors is an integer number (7441686).

Almost surely, 2^19844494 is an apocalyptic number.

19844494 is a deficient number, since it is larger than the sum of its proper divisors (9922250).

19844494 is an equidigital number, since it uses as much as digits as its factorization.

19844494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9922249.

The product of its digits is 165888, while the sum is 43.

The square root of 19844494 is about 4454.7159280924. The cubic root of 19844494 is about 270.7364166891.

The spelling of 19844494 in words is "nineteen million, eight hundred forty-four thousand, four hundred ninety-four".