19421361 has 24 divisors (see below), whose sum is σ = 31000320. Its totient is φ = 11654016.

The previous prime is 19421351. The next prime is 19421383. The reversal of 19421361 is 16312491.

It is not a de Polignac number, because 19421361 - 2¹¹ = 19419313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19421341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 760 + ... + 6278.

It is an arithmetic number, because the mean of its divisors is an integer number (1291680).

Almost surely, 2^19421361 is an apocalyptic number.

It is an amenable number.

19421361 is a deficient number, since it is larger than the sum of its proper divisors (11578959).

19421361 is a wasteful number, since it uses less digits than its factorization.

19421361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5562 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 19421361 is about 4406.9673245896. The cubic root of 19421361 is about 268.7983222286.

The spelling of 19421361 in words is "nineteen million, four hundred twenty-one thousand, three hundred sixty-one".