21083862 has 8 divisors (see below), whose sum is σ = 42167736. Its totient is φ = 7027952.

The previous prime is 21083861. The next prime is 21083869. The reversal of 21083862 is 26838012.

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

21083862 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083861) by changing a digit.

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, 1756983 + ... + 1756994.

It is an arithmetic number, because the mean of its divisors is an integer number (5270967).

Almost surely, 2^21083862 is an apocalyptic number.

21083862 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.

21083862 is a wasteful number, since it uses less digits than its factorization.

21083862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513982.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 21083862 is about 4591.7166724440. The cubic root of 21083862 is about 276.2591820757.

It can be divided in two parts, 21083 and 862, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 21083862 in words is "twenty-one million, eighty-three thousand, eight hundred sixty-two".