21376706 has 16 divisors (see below), whose sum is σ = 36033984. Its totient is φ = 9436944.

The previous prime is 21376687. The next prime is 21376721. The reversal of 21376706 is 60767312.

It is a Curzon number.

It is an unprimeable number.

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, 17276 + ... + 18471.

It is an arithmetic number, because the mean of its divisors is an integer number (2252124).

Almost surely, 2^21376706 is an apocalyptic number.

21376706 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21376706 is a deficient number, since it is larger than the sum of its proper divisors (14657278).

21376706 is a wasteful number, since it uses less digits than its factorization.

21376706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35785.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 21376706 is about 4623.4949983751. The cubic root of 21376706 is about 277.5323383031.

The spelling of 21376706 in words is "twenty-one million, three hundred seventy-six thousand, seven hundred six".