19813141 has 2 divisors, whose sum is σ = 19813142. Its totient is φ = 19813140.

The previous prime is 19813133. The next prime is 19813151. The reversal of 19813141 is 14131891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 46225 = 4446^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 19813141 - 2³ = 19813133 is a prime.

It is a super-3 number, since 3×19813141³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19813151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9906570 + 9906571.

It is an arithmetic number, because the mean of its divisors is an integer number (9906571).

Almost surely, 2^19813141 is an apocalyptic number.

It is an amenable number.

19813141 is a deficient number, since it is larger than the sum of its proper divisors (1).

19813141 is an equidigital number, since it uses as much as digits as its factorization.

19813141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

The square root of 19813141 is about 4451.1954574024. The cubic root of 19813141 is about 270.5937596013.

The spelling of 19813141 in words is "nineteen million, eight hundred thirteen thousand, one hundred forty-one".