19442356 has 24 divisors (see below), whose sum is σ = 36542016. Its totient is φ = 9018240.

The previous prime is 19442341. The next prime is 19442359. The reversal of 19442356 is 65324491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442359) 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 7 ways as a sum of consecutive naturals, for example, 2815 + ... + 6841.

It is an arithmetic number, because the mean of its divisors is an integer number (1522584).

Almost surely, 2^19442356 is an apocalyptic number.

It is an amenable number.

19442356 is a deficient number, since it is larger than the sum of its proper divisors (17099660).

19442356 is a wasteful number, since it uses less digits than its factorization.

19442356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119 (or 4117 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 19442356 is about 4409.3487047409. The cubic root of 19442356 is about 268.8951466896.

The spelling of 19442356 in words is "nineteen million, four hundred forty-two thousand, three hundred fifty-six".