19219642 has 8 divisors (see below), whose sum is σ = 31047156. Its totient is φ = 8870592.

The previous prime is 19219633. The next prime is 19219657. The reversal of 19219642 is 24691291.

It can be written as a sum of positive squares in 2 ways, for example, as 13980121 + 5239521 = 3739^2 + 2289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19219598 and 19219607.

It is an unprimeable number.

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, 369583 + ... + 369634.

Almost surely, 2^19219642 is an apocalyptic number.

19219642 is a deficient number, since it is larger than the sum of its proper divisors (11827514).

19219642 is a wasteful number, since it uses less digits than its factorization.

19219642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739232.

The product of its digits is 7776, while the sum is 34.

The square root of 19219642 is about 4384.0212134523. The cubic root of 19219642 is about 267.8644614263.

The spelling of 19219642 in words is "nineteen million, two hundred nineteen thousand, six hundred forty-two".