19424493 has 18 divisors (see below), whose sum is σ = 30841902. Its totient is φ = 11771760.

The previous prime is 19424491. The next prime is 19424501. The reversal of 19424493 is 39442491.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 736164 = 4323^2 + 858^2 .

It is not a de Polignac number, because 19424493 - 2¹ = 19424491 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19424491) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7830 + ... + 10007.

It is an arithmetic number, because the mean of its divisors is an integer number (1713439).

Almost surely, 2^19424493 is an apocalyptic number.

It is an amenable number.

19424493 is a deficient number, since it is larger than the sum of its proper divisors (11417409).

19424493 is a wasteful number, since it uses less digits than its factorization.

19424493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17865 (or 17851 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 19424493 is about 4407.3226566704. The cubic root of 19424493 is about 268.8127707713.

The spelling of 19424493 in words is "nineteen million, four hundred twenty-four thousand, four hundred ninety-three".