19426 has 8 divisors (see below), whose sum is σ = 31824.
Its totient is φ = 8820.
The previous prime is 19423. The next prime is 19427. The reversal of 19426 is 62491.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 883 = 19426 / (1 + 9 + 4 + 2 + 6).
It is a junction number, because it is equal to n+sod(n) for n = 19397 and 19406.
It is not an unprimeable number, because it can be changed into a prime (19421) 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, 420 + ... + 463.
It is an arithmetic number, because the mean of its divisors is an integer number (3978).
219426 is an apocalyptic number.
19426 is the 75-th centered heptagonal number.
19426 is a deficient number, since it is larger than the sum of its proper divisors (12398).
19426 is a wasteful number, since it uses less digits than its factorization.
19426 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 896.
The product of its digits is 432, while the sum is 22.
The square root of 19426 is about 139.3771860815.
The cubic root of 19426 is about 26.8819722310.
The spelling of 19426 in words is "nineteen thousand, four hundred twenty-six".