21366414 has 12 divisors (see below), whose sum is σ = 46293936. Its totient is φ = 7122132.

The previous prime is 21366407. The next prime is 21366463. The reversal of 21366414 is 41466312.

21366414 is a `hidden beast` number, since 2 + 13 + 6 + 641 + 4 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593494 + ... + 593529.

It is an arithmetic number, because the mean of its divisors is an integer number (3857828).

Almost surely, 2^21366414 is an apocalyptic number.

21366414 is an abundant number, since it is smaller than the sum of its proper divisors (24927522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21366414 is a wasteful number, since it uses less digits than its factorization.

21366414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187031 (or 1187028 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 21366414 is about 4622.3818535469. The cubic root of 21366414 is about 277.4877910382.

The spelling of 21366414 in words is "twenty-one million, three hundred sixty-six thousand, four hundred fourteen".