21366701 has 8 divisors (see below), whose sum is σ = 22343424. Its totient is φ = 20394000.

The previous prime is 21366689. The next prime is 21366713. The reversal of 21366701 is 10766312.

It is an interprime number because it is at equal distance from previous prime (21366689) and next prime (21366713).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21366701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21366721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16655 + ... + 17891.

It is an arithmetic number, because the mean of its divisors is an integer number (2792928).

Almost surely, 2^21366701 is an apocalyptic number.

It is an amenable number.

21366701 is a deficient number, since it is larger than the sum of its proper divisors (976723).

21366701 is a wasteful number, since it uses less digits than its factorization.

21366701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 21366701 is about 4622.4128980436. The cubic root of 21366701 is about 277.4890334654.

The spelling of 21366701 in words is "twenty-one million, three hundred sixty-six thousand, seven hundred one".