21022134 has 16 divisors (see below), whose sum is σ = 48050688. Its totient is φ = 6006312.

The previous prime is 21022117. The next prime is 21022163. The reversal of 21022134 is 43122012.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250222 + ... + 250305.

It is an arithmetic number, because the mean of its divisors is an integer number (3003168).

Almost surely, 2^21022134 is an apocalyptic number.

21022134 is an abundant number, since it is smaller than the sum of its proper divisors (27028554).

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

21022134 is a wasteful number, since it uses less digits than its factorization.

21022134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500539.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21022134 is about 4584.9900763251. The cubic root of 21022134 is about 275.9893138060.

Adding to 21022134 its reverse (43122012), we get a palindrome (64144146).

The spelling of 21022134 in words is "twenty-one million, twenty-two thousand, one hundred thirty-four".