19554061 has 2 divisors, whose sum is σ = 19554062. Its totient is φ = 19554060.

The previous prime is 19554037. The next prime is 19554077. The reversal of 19554061 is 16045591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19272100 + 281961 = 4390^2 + 531^2 .

It is a cyclic number.

It is not a de Polignac number, because 19554061 - 2⁹ = 19553549 is a prime.

It is a super-2 number, since 2×19554061² = 764722603183442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19555061) 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 as a sum of consecutive naturals, namely, 9777030 + 9777031.

It is an arithmetic number, because the mean of its divisors is an integer number (9777031).

Almost surely, 2^19554061 is an apocalyptic number.

It is an amenable number.

19554061 is a deficient number, since it is larger than the sum of its proper divisors (1).

19554061 is an equidigital number, since it uses as much as digits as its factorization.

19554061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 19554061 is about 4421.9973993660. The cubic root of 19554061 is about 269.4091377253.

The spelling of 19554061 in words is "nineteen million, five hundred fifty-four thousand, sixty-one".