21262030 has 8 divisors (see below), whose sum is σ = 38271672. Its totient is φ = 8504808.

The previous prime is 21262009. The next prime is 21262049. The reversal of 21262030 is 3026212.

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 = 21261995 and 21262013.

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 3 ways as a sum of consecutive naturals, for example, 1063092 + ... + 1063111.

It is an arithmetic number, because the mean of its divisors is an integer number (4783959).

Almost surely, 2^21262030 is an apocalyptic number.

21262030 is a deficient number, since it is larger than the sum of its proper divisors (17009642).

21262030 is a wasteful number, since it uses less digits than its factorization.

21262030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126210.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21262030 is about 4611.0768807297. The cubic root of 21262030 is about 277.0351712825.

Adding to 21262030 its reverse (3026212), we get a palindrome (24288242).

The spelling of 21262030 in words is "twenty-one million, two hundred sixty-two thousand, thirty".