19564141 has 2 divisors, whose sum is σ = 19564142. Its totient is φ = 19564140.

The previous prime is 19564133. The next prime is 19564151. The reversal of 19564141 is 14146591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12752041 + 6812100 = 3571^2 + 2610^2 .

It is an emirp because it is prime and its reverse (14146591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19564141 - 2³ = 19564133 is a prime.

It is a super-2 number, since 2×19564141² = 765511226135762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19564151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9782070 + 9782071.

It is an arithmetic number, because the mean of its divisors is an integer number (9782071).

Almost surely, 2^19564141 is an apocalyptic number.

It is an amenable number.

19564141 is a deficient number, since it is larger than the sum of its proper divisors (1).

19564141 is an equidigital number, since it uses as much as digits as its factorization.

19564141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 19564141 is about 4423.1370089564. The cubic root of 19564141 is about 269.4554226992.

The spelling of 19564141 in words is "nineteen million, five hundred sixty-four thousand, one hundred forty-one".