21024093 has 16 divisors (see below), whose sum is σ = 29808000. Its totient is φ = 13151424.

The previous prime is 21024083. The next prime is 21024097. The reversal of 21024093 is 39042012.

It is not a de Polignac number, because 21024093 - 2⁸ = 21023837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024097) 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, 783 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (1863000).

Almost surely, 2^21024093 is an apocalyptic number.

21024093 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21024093 is a deficient number, since it is larger than the sum of its proper divisors (8783907).

21024093 is a wasteful number, since it uses less digits than its factorization.

21024093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21024093 is about 4585.2037032176. The cubic root of 21024093 is about 275.9978864572.

The spelling of 21024093 in words is "twenty-one million, twenty-four thousand, ninety-three".