19349421 has 16 divisors (see below), whose sum is σ = 31753344. Its totient is φ = 10206144.

The previous prime is 19349413. The next prime is 19349489. The reversal of 19349421 is 12494391.

It is not a de Polignac number, because 19349421 - 2³ = 19349413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19349411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35166 + ... + 35711.

It is an arithmetic number, because the mean of its divisors is an integer number (1984584).

Almost surely, 2^19349421 is an apocalyptic number.

It is an amenable number.

19349421 is a deficient number, since it is larger than the sum of its proper divisors (12403923).

19349421 is a wasteful number, since it uses less digits than its factorization.

19349421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70900.

The product of its digits is 7776, while the sum is 33.

The square root of 19349421 is about 4398.7976766385. The cubic root of 19349421 is about 268.4660201339.

The spelling of 19349421 in words is "nineteen million, three hundred forty-nine thousand, four hundred twenty-one".