21148230 has 32 divisors (see below), whose sum is σ = 50925024. Its totient is φ = 5620736.

The previous prime is 21148223. The next prime is 21148241. The reversal of 21148230 is 3284112.

It is a junction number, because it is equal to n+sod(n) for n = 21148197 and 21148206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9592 + ... + 11588.

It is an arithmetic number, because the mean of its divisors is an integer number (1591407).

Almost surely, 2^21148230 is an apocalyptic number.

21148230 is an abundant number, since it is smaller than the sum of its proper divisors (29776794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21148230 is a wasteful number, since it uses less digits than its factorization.

21148230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21148230 is about 4598.7204742189. The cubic root of 21148230 is about 276.5400317219.

The spelling of 21148230 in words is "twenty-one million, one hundred forty-eight thousand, two hundred thirty".