19473421 has 8 divisors (see below), whose sum is σ = 21513600. Its totient is φ = 17478240.

The previous prime is 19473409. The next prime is 19473427. The reversal of 19473421 is 12437491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19473421 - 2¹¹ = 19471373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19473427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10336 + ... + 12073.

It is an arithmetic number, because the mean of its divisors is an integer number (2689200).

Almost surely, 2^19473421 is an apocalyptic number.

19473421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19473421 is a deficient number, since it is larger than the sum of its proper divisors (2040179).

19473421 is a wasteful number, since it uses less digits than its factorization.

19473421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22499.

The product of its digits is 6048, while the sum is 31.

The square root of 19473421 is about 4412.8699278361. The cubic root of 19473421 is about 269.0382840533.

The spelling of 19473421 in words is "nineteen million, four hundred seventy-three thousand, four hundred twenty-one".