21234862 has 16 divisors (see below), whose sum is σ = 35557632. Its totient is φ = 9427320.

The previous prime is 21234841. The next prime is 21234877. The reversal of 21234862 is 26843212.

It is a self number, because there is not a number n which added to its sum of digits gives 21234862.

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, 10278 + ... + 12169.

It is an arithmetic number, because the mean of its divisors is an integer number (2222352).

Almost surely, 2^21234862 is an apocalyptic number.

21234862 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21234862 is a deficient number, since it is larger than the sum of its proper divisors (14322770).

21234862 is a wasteful number, since it uses less digits than its factorization.

21234862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22503.

The product of its digits is 4608, while the sum is 28.

The square root of 21234862 is about 4608.1299894860. The cubic root of 21234862 is about 276.9171251768.

The spelling of 21234862 in words is "twenty-one million, two hundred thirty-four thousand, eight hundred sixty-two".