21000702 has 32 divisors (see below), whose sum is σ = 45250560. Its totient is φ = 6478560.

The previous prime is 21000689. The next prime is 21000709. The reversal of 21000702 is 20700012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000709) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1824 + ... + 6732.

It is an arithmetic number, because the mean of its divisors is an integer number (1414080).

Almost surely, 2^21000702 is an apocalyptic number.

21000702 is an abundant number, since it is smaller than the sum of its proper divisors (24249858).

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

21000702 is a wasteful number, since it uses less digits than its factorization.

21000702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 21000702 is about 4582.6522887952. The cubic root of 21000702 is about 275.8954918337.

Adding to 21000702 its reverse (20700012), we get a palindrome (41700714).

The spelling of 21000702 in words is "twenty-one million, seven hundred two", and thus it is an aban number.