19421123 has 8 divisors (see below), whose sum is σ = 20825280. Its totient is φ = 18046080.

The previous prime is 19421113. The next prime is 19421141. The reversal of 19421123 is 32112491.

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 19421123 - 2⁸ = 19420867 is a prime.

It is a super-2 number, since 2×19421123² = 754360037162258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19421113) 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, 5888 + ... + 8573.

It is an arithmetic number, because the mean of its divisors is an integer number (2603160).

Almost surely, 2^19421123 is an apocalyptic number.

19421123 is a deficient number, since it is larger than the sum of its proper divisors (1404157).

19421123 is a wasteful number, since it uses less digits than its factorization.

19421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14557.

The product of its digits is 432, while the sum is 23.

The square root of 19421123 is about 4406.9403218106. The cubic root of 19421123 is about 268.7972242234.

The spelling of 19421123 in words is "nineteen million, four hundred twenty-one thousand, one hundred twenty-three".