21465093 has 16 divisors (see below), whose sum is σ = 30917376. Its totient is φ = 13168320.

The previous prime is 21465071. The next prime is 21465121. The reversal of 21465093 is 39056412.

It is not a de Polignac number, because 21465093 - 2⁵ = 21465061 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21465093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21465013) 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, 16171 + ... + 17447.

It is an arithmetic number, because the mean of its divisors is an integer number (1932336).

Almost surely, 2^21465093 is an apocalyptic number.

It is an amenable number.

21465093 is a deficient number, since it is larger than the sum of its proper divisors (9452283).

21465093 is a wasteful number, since it uses less digits than its factorization.

21465093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 21465093 is about 4633.0436000539. The cubic root of 21465093 is about 277.9143198168.

The spelling of 21465093 in words is "twenty-one million, four hundred sixty-five thousand, ninety-three".