21696093 has 40 divisors (see below), whose sum is σ = 34151040. Its totient is φ = 13711680.

The previous prime is 21696083. The next prime is 21696121. The reversal of 21696093 is 39069612.

21696093 = 44³ + 45³ + ... + 97³.

It is not a de Polignac number, because 21696093 - 2⁸ = 21695837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21696013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 156018 + ... + 156156.

It is an arithmetic number, because the mean of its divisors is an integer number (853776).

Almost surely, 2^21696093 is an apocalyptic number.

It is an amenable number.

21696093 is a deficient number, since it is larger than the sum of its proper divisors (12454947).

21696093 is a wasteful number, since it uses less digits than its factorization.

21696093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 21696093 is about 4657.9065039994. The cubic root of 21696093 is about 278.9077044695.

It can be divided in two parts, 2169609 and 3, that added together give a palindrome (2169612).

The spelling of 21696093 in words is "twenty-one million, six hundred ninety-six thousand, ninety-three".