21367093 has 16 divisors (see below), whose sum is σ = 24470784. Its totient is φ = 18480960.

The previous prime is 21367067. The next prime is 21367111. The reversal of 21367093 is 39076312.

It is a cyclic number.

It is not a de Polignac number, because 21367093 - 2⁵ = 21367061 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 (21367193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18571 + ... + 19687.

It is an arithmetic number, because the mean of its divisors is an integer number (1529424).

Almost surely, 2^21367093 is an apocalyptic number.

It is an amenable number.

21367093 is a deficient number, since it is larger than the sum of its proper divisors (3103691).

21367093 is a wasteful number, since it uses less digits than its factorization.

21367093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 21367093 is about 4622.4552999461. The cubic root of 21367093 is about 277.4907304211.

It can be divided in two parts, 2136 and 7093, that added together give a palindrome (9229).

The spelling of 21367093 in words is "twenty-one million, three hundred sixty-seven thousand, ninety-three".