19442065 has 4 divisors (see below), whose sum is σ = 23330484. Its totient is φ = 15553648.

The previous prime is 19442051. The next prime is 19442083. The reversal of 19442065 is 56024491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13483584 + 5958481 = 3672^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 19442065 - 2²³ = 11053457 is a prime.

It is a Duffinian 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, 1944202 + ... + 1944211.

It is an arithmetic number, because the mean of its divisors is an integer number (5832621).

Almost surely, 2^19442065 is an apocalyptic number.

It is an amenable number.

19442065 is a deficient number, since it is larger than the sum of its proper divisors (3888419).

19442065 is an equidigital number, since it uses as much as digits as its factorization.

19442065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888418.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 19442065 is about 4409.3157065468. The cubic root of 19442065 is about 268.8938051362.

The spelling of 19442065 in words is "nineteen million, four hundred forty-two thousand, sixty-five".