21541134 has 16 divisors (see below), whose sum is σ = 43999488. Its totient is φ = 7027512.

The previous prime is 21541129. The next prime is 21541183. The reversal of 21541134 is 43114512.

It is a self number, because there is not a number n which added to its sum of digits gives 21541134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37912 + ... + 38475.

It is an arithmetic number, because the mean of its divisors is an integer number (2749968).

Almost surely, 2^21541134 is an apocalyptic number.

21541134 is an abundant number, since it is smaller than the sum of its proper divisors (22458354).

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

21541134 is a wasteful number, since it uses less digits than its factorization.

21541134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76439.

The product of its digits is 480, while the sum is 21.

The square root of 21541134 is about 4641.2427215133. The cubic root of 21541134 is about 278.2421074653.

Adding to 21541134 its reverse (43114512), we get a palindrome (64655646).

The spelling of 21541134 in words is "twenty-one million, five hundred forty-one thousand, one hundred thirty-four".