21246706 has 16 divisors (see below), whose sum is σ = 34574400. Its totient is φ = 9733968.

The previous prime is 21246689. The next prime is 21246707. The reversal of 21246706 is 60764212.

It is not an unprimeable number, because it can be changed into a prime (21246707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (2160900).

Almost surely, 2^21246706 is an apocalyptic number.

21246706 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21246706 is a deficient number, since it is larger than the sum of its proper divisors (13327694).

21246706 is a wasteful number, since it uses less digits than its factorization.

21246706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21246706 is about 4609.4149303355. The cubic root of 21246706 is about 276.9686002281.

It can be divided in two parts, 21246 and 706, that added together give a cube (21952 = 28³).

The spelling of 21246706 in words is "twenty-one million, two hundred forty-six thousand, seven hundred six".