19426417 has 4 divisors (see below), whose sum is σ = 20448880.
Its totient is φ = 18403956.
The previous prime is 19426409. The next prime is 19426423. The reversal of 19426417 is 71462491.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 19426417 - 23 = 19426409 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (19426447) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511203 + ... + 511240.
It is an arithmetic number, because the mean of its divisors is an integer number (5112220).
Almost surely, 219426417 is an apocalyptic number.
It is an amenable number.
19426417 is a deficient number, since it is larger than the sum of its proper divisors (1022463).
19426417 is a wasteful number, since it uses less digits than its factorization.
19426417 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1022462.
The product of its digits is 12096, while the sum is 34.
The square root of 19426417 is about 4407.5409243704.
The cubic root of 19426417 is about 268.8216457983.
The spelling of 19426417 in words is "nineteen million, four hundred twenty-six thousand, four hundred seventeen".