21134862 has 48 divisors (see below), whose sum is σ = 53239680. Its totient is φ = 5934096.

The previous prime is 21134857. The next prime is 21134899. The reversal of 21134862 is 26843112.

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, 6013 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (1109160).

Almost surely, 2^21134862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21134862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26619840).

21134862 is an abundant number, since it is smaller than the sum of its proper divisors (32104818).

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

21134862 is a wasteful number, since it uses less digits than its factorization.

21134862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2914 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 21134862 is about 4597.2667966956. The cubic root of 21134862 is about 276.4817515673.

Adding to 21134862 its reverse (26843112), we get a palindrome (47977974).

The spelling of 21134862 in words is "twenty-one million, one hundred thirty-four thousand, eight hundred sixty-two".