19795381 has 4 divisors (see below), whose sum is σ = 19977100. Its totient is φ = 19613664.

The previous prime is 19795367. The next prime is 19795393. The reversal of 19795381 is 18359791.

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 12666481 + 7128900 = 3559^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 19795381 - 2⁷ = 19795253 is a prime.

It is a super-2 number, since 2×19795381² = 783714217870322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19795331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90696 + ... + 90913.

It is an arithmetic number, because the mean of its divisors is an integer number (4994275).

Almost surely, 2^19795381 is an apocalyptic number.

It is an amenable number.

19795381 is a deficient number, since it is larger than the sum of its proper divisors (181719).

19795381 is a wasteful number, since it uses less digits than its factorization.

19795381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181718.

The product of its digits is 68040, while the sum is 43.

The square root of 19795381 is about 4449.2000404567. The cubic root of 19795381 is about 270.5128842906.

The spelling of 19795381 in words is "nineteen million, seven hundred ninety-five thousand, three hundred eighty-one".