21376134 has 36 divisors (see below), whose sum is σ = 50158836. Its totient is φ = 6576336.

The previous prime is 21376133. The next prime is 21376141. The reversal of 21376134 is 43167312.

It is a junction number, because it is equal to n+sod(n) for n = 21376098 and 21376107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21376133) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 472 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (1393301).

Almost surely, 2^21376134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21376134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25079418).

21376134 is an abundant number, since it is smaller than the sum of its proper divisors (28782702).

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

21376134 is a wasteful number, since it uses less digits than its factorization.

21376134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061 (or 7045 counting only the distinct ones).

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

The square root of 21376134 is about 4623.4331399946. The cubic root of 21376134 is about 277.5298628685.

The spelling of 21376134 in words is "twenty-one million, three hundred seventy-six thousand, one hundred thirty-four".