19231949 has 4 divisors (see below), whose sum is σ = 20980320. Its totient is φ = 17483580.

The previous prime is 19231943. The next prime is 19231963. The reversal of 19231949 is 94913291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94913291 = 11 ⋅8628481.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19231949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19231943) 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 3 ways as a sum of consecutive naturals, for example, 874169 + ... + 874190.

It is an arithmetic number, because the mean of its divisors is an integer number (5245080).

Almost surely, 2^19231949 is an apocalyptic number.

It is an amenable number.

19231949 is a deficient number, since it is larger than the sum of its proper divisors (1748371).

19231949 is a wasteful number, since it uses less digits than its factorization.

19231949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748370.

The product of its digits is 17496, while the sum is 38.

The square root of 19231949 is about 4385.4246088606. The cubic root of 19231949 is about 267.9216235131.

The spelling of 19231949 in words is "nineteen million, two hundred thirty-one thousand, nine hundred forty-nine".