19441381 has 2 divisors, whose sum is σ = 19441382. Its totient is φ = 19441380.

The previous prime is 19441361. The next prime is 19441393. The reversal of 19441381 is 18314491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17564481 + 1876900 = 4191^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 19441381 - 2¹³ = 19433189 is a prime.

It is a super-2 number, since 2×19441381² = 755934590374322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19441321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720690 + 9720691.

It is an arithmetic number, because the mean of its divisors is an integer number (9720691).

Almost surely, 2^19441381 is an apocalyptic number.

It is an amenable number.

19441381 is a deficient number, since it is larger than the sum of its proper divisors (1).

19441381 is an equidigital number, since it uses as much as digits as its factorization.

19441381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 19441381 is about 4409.2381428088. The cubic root of 19441381 is about 268.8906517414.

The spelling of 19441381 in words is "nineteen million, four hundred forty-one thousand, three hundred eighty-one".