21104262 has 24 divisors (see below), whose sum is σ = 46012824. Its totient is φ = 6990624.

The previous prime is 21104249. The next prime is 21104267. The reversal of 21104262 is 26240112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663 + ... + 6530.

It is an arithmetic number, because the mean of its divisors is an integer number (1917201).

Almost surely, 2^21104262 is an apocalyptic number.

21104262 is an abundant number, since it is smaller than the sum of its proper divisors (24908562).

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

21104262 is a wasteful number, since it uses less digits than its factorization.

21104262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7364 (or 7361 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21104262 is about 4593.9375267846. The cubic root of 21104262 is about 276.3482528962.

Adding to 21104262 its reverse (26240112), we get a palindrome (47344374).

The spelling of 21104262 in words is "twenty-one million, one hundred four thousand, two hundred sixty-two".