19469949 has 4 divisors (see below), whose sum is σ = 25959936. Its totient is φ = 12979964.

The previous prime is 19469911. The next prime is 19469959. The reversal of 19469949 is 94996491.

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: 94996491 = 3 ⋅31665497.

It is a cyclic number.

It is not a de Polignac number, because 19469949 - 2⁸ = 19469693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19469909) 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, 3244989 + ... + 3244994.

It is an arithmetic number, because the mean of its divisors is an integer number (6489984).

Almost surely, 2^19469949 is an apocalyptic number.

It is an amenable number.

19469949 is a deficient number, since it is larger than the sum of its proper divisors (6489987).

19469949 is an equidigital number, since it uses as much as digits as its factorization.

19469949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6489986.

The product of its digits is 629856, while the sum is 51.

The square root of 19469949 is about 4412.4765155182. The cubic root of 19469949 is about 269.0222937720.

The spelling of 19469949 in words is "nineteen million, four hundred sixty-nine thousand, nine hundred forty-nine".