21448030 has 16 divisors (see below), whose sum is σ = 39073104. Its totient is φ = 8475520.

The previous prime is 21448003. The next prime is 21448051. The reversal of 21448030 is 3084412.

It is a junction number, because it is equal to n+sod(n) for n = 21447992 and 21448010.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12091 + ... + 13750.

It is an arithmetic number, because the mean of its divisors is an integer number (2442069).

Almost surely, 2^21448030 is an apocalyptic number.

21448030 is a deficient number, since it is larger than the sum of its proper divisors (17625074).

21448030 is a wasteful number, since it uses less digits than its factorization.

21448030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25931.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 21448030 is about 4631.2017878732. The cubic root of 21448030 is about 277.8406605488.

The spelling of 21448030 in words is "twenty-one million, four hundred forty-eight thousand, thirty".