19421436 has 12 divisors (see below), whose sum is σ = 45316712. Its totient is φ = 6473808.

The previous prime is 19421383. The next prime is 19421447. The reversal of 19421436 is 63412491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809215 + ... + 809238.

Almost surely, 2^19421436 is an apocalyptic number.

It is an amenable number.

19421436 is an abundant number, since it is smaller than the sum of its proper divisors (25895276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19421436 is a wasteful number, since it uses less digits than its factorization.

19421436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618460 (or 1618458 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 19421436 is about 4406.9758338344. The cubic root of 19421436 is about 268.7986682367.

The spelling of 19421436 in words is "nineteen million, four hundred twenty-one thousand, four hundred thirty-six".