19421375 has 8 divisors (see below), whose sum is σ = 24238032. Its totient is φ = 15537000.

The previous prime is 19421351. The next prime is 19421383. The reversal of 19421375 is 57312491.

It is not a de Polignac number, because 19421375 - 2¹⁶ = 19355839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 77561 + ... + 77810.

It is an arithmetic number, because the mean of its divisors is an integer number (3029754).

Almost surely, 2^19421375 is an apocalyptic number.

19421375 is a deficient number, since it is larger than the sum of its proper divisors (4816657).

19421375 is an equidigital number, since it uses as much as digits as its factorization.

19421375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155386 (or 155376 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 19421375 is about 4406.9689129832. The cubic root of 19421375 is about 268.7983868168.

The spelling of 19421375 in words is "nineteen million, four hundred twenty-one thousand, three hundred seventy-five".