21230862 has 8 divisors (see below), whose sum is σ = 42461736. Its totient is φ = 7076952.

The previous prime is 21230857. The next prime is 21230873. The reversal of 21230862 is 26803212.

It is a sphenic number, since it is the product of 3 distinct primes.

21230862 is an admirable number.

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, 1769233 + ... + 1769244.

It is an arithmetic number, because the mean of its divisors is an integer number (5307717).

Almost surely, 2^21230862 is an apocalyptic number.

21230862 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21230862 is a wasteful number, since it uses less digits than its factorization.

21230862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538482.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21230862 is about 4607.6959535108. The cubic root of 21230862 is about 276.8997365062.

The spelling of 21230862 in words is "twenty-one million, two hundred thirty thousand, eight hundred sixty-two".