21183130 has 8 divisors (see below), whose sum is σ = 38129652. Its totient is φ = 8473248.

The previous prime is 21183121. The next prime is 21183167. The reversal of 21183130 is 3138112.

It can be written as a sum of positive squares in 2 ways, for example, as 20169081 + 1014049 = 4491^2 + 1007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21183098 and 21183107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059147 + ... + 1059166.

Almost surely, 2^21183130 is an apocalyptic number.

21183130 is a deficient number, since it is larger than the sum of its proper divisors (16946522).

21183130 is a wasteful number, since it uses less digits than its factorization.

21183130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118320.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 21183130 is about 4602.5134437609. The cubic root of 21183130 is about 276.6920687633.

The spelling of 21183130 in words is "twenty-one million, one hundred eighty-three thousand, one hundred thirty".