19492123 has 16 divisors (see below), whose sum is σ = 22855680. Its totient is φ = 16279200.

The previous prime is 19492117. The next prime is 19492129. The reversal of 19492123 is 32129491.

It is an interprime number because it is at equal distance from previous prime (19492117) and next prime (19492129).

It is not a de Polignac number, because 19492123 - 2⁹ = 19491611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19492129) 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 in 15 ways as a sum of consecutive naturals, for example, 81438 + ... + 81676.

It is an arithmetic number, because the mean of its divisors is an integer number (1428480).

Almost surely, 2^19492123 is an apocalyptic number.

19492123 is a deficient number, since it is larger than the sum of its proper divisors (3363557).

19492123 is a wasteful number, since it uses less digits than its factorization.

19492123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its digits is 3888, while the sum is 31.

The square root of 19492123 is about 4414.9884484560. The cubic root of 19492123 is about 269.1243833594.

The spelling of 19492123 in words is "nineteen million, four hundred ninety-two thousand, one hundred twenty-three".