21014838 has 48 divisors (see below), whose sum is σ = 50633856. Its totient is φ = 6255360.

The previous prime is 21014813. The next prime is 21014843. The reversal of 21014838 is 83841012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5806 + ... + 8702.

It is an arithmetic number, because the mean of its divisors is an integer number (1054872).

Almost surely, 2^21014838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21014838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25316928).

21014838 is an abundant number, since it is smaller than the sum of its proper divisors (29619018).

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

21014838 is a wasteful number, since it uses less digits than its factorization.

21014838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949 (or 2946 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 21014838 is about 4584.1943676070. The cubic root of 21014838 is about 275.9573815732.

The spelling of 21014838 in words is "twenty-one million, fourteen thousand, eight hundred thirty-eight".