19108742 has 4 divisors (see below), whose sum is σ = 28663116. Its totient is φ = 9554370.

The previous prime is 19108711. The next prime is 19108751. The reversal of 19108742 is 24780191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24780191 = 31 ⋅799361.

It is a junction number, because it is equal to n+sod(n) for n = 19108699 and 19108708.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4777184 + ... + 4777187.

It is an arithmetic number, because the mean of its divisors is an integer number (7165779).

Almost surely, 2^19108742 is an apocalyptic number.

19108742 is a deficient number, since it is larger than the sum of its proper divisors (9554374).

19108742 is an equidigital number, since it uses as much as digits as its factorization.

19108742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554373.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 19108742 is about 4371.3547099269. The cubic root of 19108742 is about 267.3482622713.

The spelling of 19108742 in words is "nineteen million, one hundred eight thousand, seven hundred forty-two".