19428863 has 2 divisors, whose sum is σ = 19428864. Its totient is φ = 19428862.

The previous prime is 19428853. The next prime is 19428883. The reversal of 19428863 is 36882491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19428863 - 2¹² = 19424767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19428863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19428833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714431 + 9714432.

It is an arithmetic number, because the mean of its divisors is an integer number (9714432).

Almost surely, 2^19428863 is an apocalyptic number.

19428863 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428863 is an equidigital number, since it uses as much as digits as its factorization.

19428863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 19428863 is about 4407.8183946256. The cubic root of 19428863 is about 268.8329278607.

The spelling of 19428863 in words is "nineteen million, four hundred twenty-eight thousand, eight hundred sixty-three".