19428361 has 2 divisors, whose sum is σ = 19428362. Its totient is φ = 19428360.

The previous prime is 19428349. The next prime is 19428371. The reversal of 19428361 is 16382491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19404025 + 24336 = 4405^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 19428361 - 2²³ = 11039753 is a prime.

It is a super-2 number, since 2×19428361² = 754922422292642, which contains 22 as substring.

It is equal to p_1236589 and since 19428361 and 1236589 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (19428341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714180 + 9714181.

It is an arithmetic number, because the mean of its divisors is an integer number (9714181).

Almost surely, 2^19428361 is an apocalyptic number.

It is an amenable number.

19428361 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428361 is an equidigital number, since it uses as much as digits as its factorization.

19428361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 19428361 is about 4407.7614499880. The cubic root of 19428361 is about 268.8306124861.

The spelling of 19428361 in words is "nineteen million, four hundred twenty-eight thousand, three hundred sixty-one".