21102094 has 8 divisors (see below), whose sum is σ = 34088040. Its totient is φ = 9739416.

The previous prime is 21102091. The next prime is 21102101. The reversal of 21102094 is 49020112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102091) 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 3 ways as a sum of consecutive naturals, for example, 405784 + ... + 405835.

It is an arithmetic number, because the mean of its divisors is an integer number (4261005).

Almost surely, 2^21102094 is an apocalyptic number.

21102094 is a deficient number, since it is larger than the sum of its proper divisors (12985946).

21102094 is a wasteful number, since it uses less digits than its factorization.

21102094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811634.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 21102094 is about 4593.7015575677. The cubic root of 21102094 is about 276.3387896650.

The spelling of 21102094 in words is "twenty-one million, one hundred two thousand, ninety-four".