19149945 has 16 divisors (see below), whose sum is σ = 30694272. Its totient is φ = 10195200.

The previous prime is 19149943. The next prime is 19149953. The reversal of 19149945 is 54994191.

It is a happy number.

It is not a de Polignac number, because 19149945 - 2¹ = 19149943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19149897 and 19149906.

It is not an unprimeable number, because it can be changed into a prime (19149943) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 15345 + ... + 16545.

It is an arithmetic number, because the mean of its divisors is an integer number (1918392).

Almost surely, 2^19149945 is an apocalyptic number.

19149945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19149945 is a deficient number, since it is larger than the sum of its proper divisors (11544327).

19149945 is a wasteful number, since it uses less digits than its factorization.

19149945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272.

The product of its digits is 58320, while the sum is 42.

The square root of 19149945 is about 4376.0650132282. The cubic root of 19149945 is about 267.5402798400.

The spelling of 19149945 in words is "nineteen million, one hundred forty-nine thousand, nine hundred forty-five".