19916946 has 24 divisors (see below), whose sum is σ = 49318464. Its totient is φ = 5690520.

The previous prime is 19916933. The next prime is 19916947. The reversal of 19916946 is 64961991.

It is a super-3 number, since 3×19916946³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19916947) 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 11 ways as a sum of consecutive naturals, for example, 78910 + ... + 79161.

It is an arithmetic number, because the mean of its divisors is an integer number (2054936).

Almost surely, 2^19916946 is an apocalyptic number.

19916946 is an abundant number, since it is smaller than the sum of its proper divisors (29401518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19916946 is a wasteful number, since it uses less digits than its factorization.

19916946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158086 (or 158083 counting only the distinct ones).

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

The square root of 19916946 is about 4462.8405752390. The cubic root of 19916946 is about 271.0655016116.

The spelling of 19916946 in words is "nineteen million, nine hundred sixteen thousand, nine hundred forty-six".