21050134 has 32 divisors (see below), whose sum is σ = 37509120. Its totient is φ = 8672832.

The previous prime is 21050111. The next prime is 21050137. The reversal of 21050134 is 43105012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43707 + ... + 44185.

It is an arithmetic number, because the mean of its divisors is an integer number (1172160).

Almost surely, 2^21050134 is an apocalyptic number.

21050134 is a deficient number, since it is larger than the sum of its proper divisors (16458986).

21050134 is a wasteful number, since it uses less digits than its factorization.

21050134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21050134 is about 4588.0425019827. The cubic root of 21050134 is about 276.1117922122. Note that the first 3 decimals are identical.

Adding to 21050134 its reverse (43105012), we get a palindrome (64155146).

The spelling of 21050134 in words is "twenty-one million, fifty thousand, one hundred thirty-four".