10821946 has 4 divisors (see below), whose sum is σ = 16232922. Its totient is φ = 5410972.

The previous prime is 10821931. The next prime is 10821947. The reversal of 10821946 is 64912801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64912801 = 101 ⋅642701.

It can be written as a sum of positive squares in only one way, i.e., 10080625 + 741321 = 3175^2 + 861^2 .

It is a super-2 number, since 2×10821946² = 234229030453832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (10821947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2705485 + ... + 2705488.

Almost surely, 2^10821946 is an apocalyptic number.

10821946 is a deficient number, since it is larger than the sum of its proper divisors (5410976).

10821946 is an equidigital number, since it uses as much as digits as its factorization.

10821946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410975.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 10821946 is about 3289.6726280893. The cubic root of 10821946 is about 221.1915103884.

The spelling of 10821946 in words is "ten million, eight hundred twenty-one thousand, nine hundred forty-six".