21700466 has 16 divisors (see below), whose sum is σ = 35269344. Its totient is φ = 9973824.

The previous prime is 21700409. The next prime is 21700493. The reversal of 21700466 is 66400712.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5960 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (2204334).

Almost surely, 2^21700466 is an apocalyptic number.

21700466 is a deficient number, since it is larger than the sum of its proper divisors (13568878).

21700466 is a wasteful number, since it uses less digits than its factorization.

21700466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14905.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 21700466 is about 4658.3758972414. The cubic root of 21700466 is about 278.9264418132.

The spelling of 21700466 in words is "twenty-one million, seven hundred thousand, four hundred sixty-six".