21094110 has 72 divisors (see below), whose sum is σ = 58332456. Its totient is φ = 5287680.

The previous prime is 21094109. The next prime is 21094111. The reversal of 21094110 is 1149012.

It is an interprime number because it is at equal distance from previous prime (21094109) and next prime (21094111).

It is a super-2 number, since 2×21094110² = 889922953384200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21094111) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25605 + ... + 26415.

It is an arithmetic number, because the mean of its divisors is an integer number (810173).

Almost surely, 2^21094110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21094110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29166228).

21094110 is an abundant number, since it is smaller than the sum of its proper divisors (37238346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21094110 is a wasteful number, since it uses less digits than its factorization.

21094110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 21094110 is about 4592.8324593871. The cubic root of 21094110 is about 276.3039342425.

The spelling of 21094110 in words is "twenty-one million, ninety-four thousand, one hundred ten".