19421394 has 16 divisors (see below), whose sum is σ = 39127968. Its totient is φ = 6426272.

The previous prime is 19421383. The next prime is 19421447. The reversal of 19421394 is 49312491.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10992 + ... + 12635.

It is an arithmetic number, because the mean of its divisors is an integer number (2445498).

Almost surely, 2^19421394 is an apocalyptic number.

19421394 is an abundant number, since it is smaller than the sum of its proper divisors (19706574).

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

19421394 is a wasteful number, since it uses less digits than its factorization.

19421394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23769.

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

The square root of 19421394 is about 4406.9710686593. The cubic root of 19421394 is about 268.7984744723.

The spelling of 19421394 in words is "nineteen million, four hundred twenty-one thousand, three hundred ninety-four".