19423403 has 2 divisors, whose sum is σ = 19423404. Its totient is φ = 19423402.

The previous prime is 19423373. The next prime is 19423421. The reversal of 19423403 is 30432491.

It is a strong prime.

It is an emirp because it is prime and its reverse (30432491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19423403 - 2¹⁰ = 19422379 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (19423303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9711701 + 9711702.

It is an arithmetic number, because the mean of its divisors is an integer number (9711702).

Almost surely, 2^19423403 is an apocalyptic number.

19423403 is a deficient number, since it is larger than the sum of its proper divisors (1).

19423403 is an equidigital number, since it uses as much as digits as its factorization.

19423403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 19423403 is about 4407.1989970955. The cubic root of 19423403 is about 268.8077425594.

Adding to 19423403 its reverse (30432491), we get a palindrome (49855894).

The spelling of 19423403 in words is "nineteen million, four hundred twenty-three thousand, four hundred three".