19920946 has 4 divisors (see below), whose sum is σ = 29881422. Its totient is φ = 9960472.

The previous prime is 19920919. The next prime is 19920947. The reversal of 19920946 is 64902991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19704721 + 216225 = 4439^2 + 465^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 19920899 and 19920908.

It is not an unprimeable number, because it can be changed into a prime (19920947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980235 + ... + 4980238.

Almost surely, 2^19920946 is an apocalyptic number.

19920946 is a deficient number, since it is larger than the sum of its proper divisors (9960476).

19920946 is an equidigital number, since it uses as much as digits as its factorization.

19920946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9960475.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 19920946 is about 4463.2886978102. The cubic root of 19920946 is about 271.0836467869.

The spelling of 19920946 in words is "nineteen million, nine hundred twenty thousand, nine hundred forty-six".