21062708 has 12 divisors (see below), whose sum is σ = 37081632. Its totient is φ = 10467960.

The previous prime is 21062707. The next prime is 21062719. The reversal of 21062708 is 80726012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21062707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15098 + ... + 16433.

It is an arithmetic number, because the mean of its divisors is an integer number (3090136).

Almost surely, 2^21062708 is an apocalyptic number.

It is an amenable number.

21062708 is a deficient number, since it is larger than the sum of its proper divisors (16018924).

21062708 is a wasteful number, since it uses less digits than its factorization.

21062708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31702 (or 31700 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21062708 is about 4589.4125985795. The cubic root of 21062708 is about 276.1667584280.

The spelling of 21062708 in words is "twenty-one million, sixty-two thousand, seven hundred eight".