21367266 has 32 divisors (see below), whose sum is σ = 45474048. Its totient is φ = 6670080.

The previous prime is 21367243. The next prime is 21367289. The reversal of 21367266 is 66276312.

It is an interprime number because it is at equal distance from previous prime (21367243) and next prime (21367289).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27256 + ... + 28028.

It is an arithmetic number, because the mean of its divisors is an integer number (1421064).

Almost surely, 2^21367266 is an apocalyptic number.

21367266 is an abundant number, since it is smaller than the sum of its proper divisors (24106782).

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

21367266 is a wasteful number, since it uses less digits than its factorization.

21367266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its digits is 18144, while the sum is 33.

The square root of 21367266 is about 4622.4740129069. The cubic root of 21367266 is about 277.4914793261.

The spelling of 21367266 in words is "twenty-one million, three hundred sixty-seven thousand, two hundred sixty-six".