21230654 has 16 divisors (see below), whose sum is σ = 33872256. Its totient is φ = 9945600.

The previous prime is 21230641. The next prime is 21230689. The reversal of 21230654 is 45603212.

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, 6899 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (2117016).

Almost surely, 2^21230654 is an apocalyptic number.

21230654 is a deficient number, since it is larger than the sum of its proper divisors (12641602).

21230654 is a wasteful number, since it uses less digits than its factorization.

21230654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 21230654 is about 4607.6733825218. The cubic root of 21230654 is about 276.8988322356.

Adding to 21230654 its reverse (45603212), we get a palindrome (66833866).

The spelling of 21230654 in words is "twenty-one million, two hundred thirty thousand, six hundred fifty-four".