21094854 has 32 divisors (see below), whose sum is σ = 47101824. Its totient is φ = 6242880.

The previous prime is 21094831. The next prime is 21094859. The reversal of 21094854 is 45849012.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21094859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879 + ... + 6554.

It is an arithmetic number, because the mean of its divisors is an integer number (1471932).

Almost surely, 2^21094854 is an apocalyptic number.

21094854 is an abundant number, since it is smaller than the sum of its proper divisors (26006970).

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

21094854 is a wasteful number, since it uses less digits than its factorization.

21094854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 21094854 is about 4592.9134544426. The cubic root of 21094854 is about 276.3071826645.

The spelling of 21094854 in words is "twenty-one million, ninety-four thousand, eight hundred fifty-four".