19426042 has 4 divisors (see below), whose sum is σ = 29139066. Its totient is φ = 9713020.

The previous prime is 19426031. The next prime is 19426049. The reversal of 19426042 is 24062491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24062491 = 1327 ⋅18133.

It can be written as a sum of positive squares in only one way, i.e., 19280881 + 145161 = 4391^2 + 381^2 .

It is a super-2 number, since 2×19426042² = 754742215571528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19426042.

It is not an unprimeable number, because it can be changed into a prime (19426049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4856509 + ... + 4856512.

Almost surely, 2^19426042 is an apocalyptic number.

19426042 is a deficient number, since it is larger than the sum of its proper divisors (9713024).

19426042 is an equidigital number, since it uses as much as digits as its factorization.

19426042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9713023.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 19426042 is about 4407.4983834370. The cubic root of 19426042 is about 268.8199160443.

The spelling of 19426042 in words is "nineteen million, four hundred twenty-six thousand, forty-two".