21038230 has 16 divisors (see below), whose sum is σ = 38038320. Its totient is φ = 8377632.

The previous prime is 21038219. The next prime is 21038249. The reversal of 21038230 is 3283012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21038198 and 21038207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2304 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (2377395).

Almost surely, 2^21038230 is an apocalyptic number.

21038230 is a deficient number, since it is larger than the sum of its proper divisors (17000090).

21038230 is a wasteful number, since it uses less digits than its factorization.

21038230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21038230 is about 4586.7450332453. The cubic root of 21038230 is about 276.0597346727.

The spelling of 21038230 in words is "twenty-one million, thirty-eight thousand, two hundred thirty".