21296366 has 24 divisors (see below), whose sum is σ = 39536784. Its totient is φ = 8424000.

The previous prime is 21296357. The next prime is 21296369. The reversal of 21296366 is 66369212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21296369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2135 + ... + 6866.

It is an arithmetic number, because the mean of its divisors is an integer number (1647366).

Almost surely, 2^21296366 is an apocalyptic number.

21296366 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21296366 is a deficient number, since it is larger than the sum of its proper divisors (18240418).

21296366 is a wasteful number, since it uses less digits than its factorization.

21296366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036 (or 9023 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 21296366 is about 4614.7985871542. The cubic root of 21296366 is about 277.1842188848.

The spelling of 21296366 in words is "twenty-one million, two hundred ninety-six thousand, three hundred sixty-six".