21045702 has 16 divisors (see below), whose sum is σ = 42526512. Its totient is φ = 6942720.

The previous prime is 21045701. The next prime is 21045719. The reversal of 21045702 is 20754012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21045701) 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, 17499 + ... + 18662.

It is an arithmetic number, because the mean of its divisors is an integer number (2657907).

Almost surely, 2^21045702 is an apocalyptic number.

21045702 is an abundant number, since it is smaller than the sum of its proper divisors (21480810).

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

21045702 is a wasteful number, since it uses less digits than its factorization.

21045702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36263.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 21045702 is about 4587.5594819032. The cubic root of 21045702 is about 276.0924128683.

Adding to 21045702 its reverse (20754012), we get a palindrome (41799714).

The spelling of 21045702 in words is "twenty-one million, forty-five thousand, seven hundred two".