21170334 has 16 divisors (see below), whose sum is σ = 43706880. Its totient is φ = 6829080.

The previous prime is 21170333. The next prime is 21170353. The reversal of 21170334 is 43307112.

It is a self number, because there is not a number n which added to its sum of digits gives 21170334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21170333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56724 + ... + 57095.

It is an arithmetic number, because the mean of its divisors is an integer number (2731680).

Almost surely, 2^21170334 is an apocalyptic number.

21170334 is an abundant number, since it is smaller than the sum of its proper divisors (22536546).

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

21170334 is a wasteful number, since it uses less digits than its factorization.

21170334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113855.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 21170334 is about 4601.1231237601. The cubic root of 21170334 is about 276.6363441551.

Adding to 21170334 its reverse (43307112), we get a palindrome (64477446).

The spelling of 21170334 in words is "twenty-one million, one hundred seventy thousand, three hundred thirty-four".