19221946 has 16 divisors (see below), whose sum is σ = 29630304. Its totient is φ = 9347184.

The previous prime is 19221941. The next prime is 19221947. The reversal of 19221946 is 64912291.

It is not an unprimeable number, because it can be changed into a prime (19221941) 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 7 ways as a sum of consecutive naturals, for example, 33861 + ... + 34423.

It is an arithmetic number, because the mean of its divisors is an integer number (1851894).

Almost surely, 2^19221946 is an apocalyptic number.

19221946 is a deficient number, since it is larger than the sum of its proper divisors (10408358).

19221946 is a wasteful number, since it uses less digits than its factorization.

19221946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005.

The product of its digits is 7776, while the sum is 34.

The square root of 19221946 is about 4384.2839780288. The cubic root of 19221946 is about 267.8751646270.

The spelling of 19221946 in words is "nineteen million, two hundred twenty-one thousand, nine hundred forty-six".