21700966 has 8 divisors (see below), whose sum is σ = 37201680. Its totient is φ = 9300408.

The previous prime is 21700963. The next prime is 21700969. The reversal of 21700966 is 66900712.

It is an interprime number because it is at equal distance from previous prime (21700963) and next prime (21700969).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700963) 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 3 ways as a sum of consecutive naturals, for example, 775021 + ... + 775048.

It is an arithmetic number, because the mean of its divisors is an integer number (4650210).

Almost surely, 2^21700966 is an apocalyptic number.

21700966 is a deficient number, since it is larger than the sum of its proper divisors (15500714).

21700966 is a wasteful number, since it uses less digits than its factorization.

21700966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550078.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 21700966 is about 4658.4295637049. The cubic root of 21700966 is about 278.9285840430.

The spelling of 21700966 in words is "twenty-one million, seven hundred thousand, nine hundred sixty-six".