21341376 has 168 divisors, whose sum is σ = 71851520. Its totient is φ = 5930496.

The previous prime is 21341363. The next prime is 21341377. The reversal of 21341376 is 67314312.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21341377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270105 + ... + 270183.

Almost surely, 2^21341376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21341376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35925760).

21341376 is an abundant number, since it is smaller than the sum of its proper divisors (50510144).

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

21341376 is a wasteful number, since it uses less digits than its factorization.

21341376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 158 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 21341376 is about 4619.6727156802. The cubic root of 21341376 is about 277.3793583214.

Adding to 21341376 its product of digits (3024), we get a square (21344400 = 4620²).

Adding to 21341376 its reverse (67314312), we get a palindrome (88655688).

The spelling of 21341376 in words is "twenty-one million, three hundred forty-one thousand, three hundred seventy-six".