21322134 has 24 divisors (see below), whose sum is σ = 47792160. Its totient is φ = 6862128.

The previous prime is 21322129. The next prime is 21322139. The reversal of 21322134 is 43122312.

It is an interprime number because it is at equal distance from previous prime (21322129) and next prime (21322139).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322139) 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, 19902 + ... + 20945.

It is an arithmetic number, because the mean of its divisors is an integer number (1991340).

Almost surely, 2^21322134 is an apocalyptic number.

21322134 is an abundant number, since it is smaller than the sum of its proper divisors (26470026).

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

21322134 is a wasteful number, since it uses less digits than its factorization.

21322134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40884 (or 40881 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 21322134 is about 4617.5896309655. The cubic root of 21322134 is about 277.2959688449.

Adding to 21322134 its reverse (43122312), we get a palindrome (64444446).

The spelling of 21322134 in words is "twenty-one million, three hundred twenty-two thousand, one hundred thirty-four".