21352014 has 24 divisors (see below), whose sum is σ = 46347912. Its totient is φ = 7104240.

The previous prime is 21352007. The next prime is 21352031. The reversal of 21352014 is 41025312.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17649 + ... + 18819.

It is an arithmetic number, because the mean of its divisors is an integer number (1931163).

Almost surely, 2^21352014 is an apocalyptic number.

21352014 is an abundant number, since it is smaller than the sum of its proper divisors (24995898).

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

21352014 is a wasteful number, since it uses less digits than its factorization.

21352014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 21352014 is about 4620.8239525002. The cubic root of 21352014 is about 277.4254389406.

Adding to 21352014 its reverse (41025312), we get a palindrome (62377326).

The spelling of 21352014 in words is "twenty-one million, three hundred fifty-two thousand, fourteen".