19049949 has 12 divisors (see below), whose sum is σ = 28036476. Its totient is φ = 12460032.

The previous prime is 19049941. The next prime is 19049971. The reversal of 19049949 is 94994091.

It can be written as a sum of positive squares in 2 ways, for example, as 15069924 + 3980025 = 3882^2 + 1995^2 .

It is not a de Polignac number, because 19049949 - 2³ = 19049941 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19049941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19492 + ... + 20445.

It is an arithmetic number, because the mean of its divisors is an integer number (2336373).

Almost surely, 2^19049949 is an apocalyptic number.

It is an amenable number.

19049949 is a deficient number, since it is larger than the sum of its proper divisors (8986527).

19049949 is a wasteful number, since it uses less digits than its factorization.

19049949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39996 (or 39993 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 19049949 is about 4364.6247261363. The cubic root of 19049949 is about 267.0737918331.

The spelling of 19049949 in words is "nineteen million, forty-nine thousand, nine hundred forty-nine".