19421027 has 4 divisors (see below), whose sum is σ = 19435560. Its totient is φ = 19406496.

The previous prime is 19421023. The next prime is 19421033. The reversal of 19421027 is 72012491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19421027 - 2² = 19421023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19420987 and 19421005.

It is not an unprimeable number, because it can be changed into a prime (19421023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5033 + ... + 8010.

It is an arithmetic number, because the mean of its divisors is an integer number (4858890).

Almost surely, 2^19421027 is an apocalyptic number.

19421027 is a deficient number, since it is larger than the sum of its proper divisors (14533).

19421027 is a wasteful number, since it uses less digits than its factorization.

19421027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14532.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 19421027 is about 4406.9294298865. The cubic root of 19421027 is about 268.7967813281.

The spelling of 19421027 in words is "nineteen million, four hundred twenty-one thousand, twenty-seven".