21482194 has 12 divisors (see below), whose sum is σ = 33299262. Its totient is φ = 10393680.

The previous prime is 21482191. The next prime is 21482239. The reversal of 21482194 is 49128412.

It can be written as a sum of positive squares in only one way, i.e., 14538969 + 6943225 = 3813^2 + 2635^2 .

It is a super-2 number, since 2×21482194² = 922969318107272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (21482191) 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 5 ways as a sum of consecutive naturals, for example, 3667 + ... + 7510.

Almost surely, 2^21482194 is an apocalyptic number.

21482194 is a deficient number, since it is larger than the sum of its proper divisors (11817068).

21482194 is a wasteful number, since it uses less digits than its factorization.

21482194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11241 (or 11210 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 21482194 is about 4634.8887796796. Note that the first 3 decimals coincide. The cubic root of 21482194 is about 277.9881039714.

The spelling of 21482194 in words is "twenty-one million, four hundred eighty-two thousand, one hundred ninety-four".