21970302 has 32 divisors (see below), whose sum is σ = 45567360. Its totient is φ = 7057440.

The previous prime is 21970297. The next prime is 21970303. The reversal of 21970302 is 20307912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21970303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18177 + ... + 19347.

It is an arithmetic number, because the mean of its divisors is an integer number (1423980).

Almost surely, 2^21970302 is an apocalyptic number.

21970302 is an abundant number, since it is smaller than the sum of its proper divisors (23597058).

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

21970302 is a wasteful number, since it uses less digits than its factorization.

21970302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 21970302 is about 4687.2488732731. The cubic root of 21970302 is about 280.0777930104.

The spelling of 21970302 in words is "twenty-one million, nine hundred seventy thousand, three hundred two".