21854194 has 16 divisors (see below), whose sum is σ = 34350336. Its totient is φ = 10414800.

The previous prime is 21854171. The next prime is 21854207. The reversal of 21854194 is 49145812.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1524 + ... + 6784.

It is an arithmetic number, because the mean of its divisors is an integer number (2146896).

Almost surely, 2^21854194 is an apocalyptic number.

21854194 is a deficient number, since it is larger than the sum of its proper divisors (12496142).

21854194 is a wasteful number, since it uses less digits than its factorization.

21854194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361.

The product of its digits is 11520, while the sum is 34.

The square root of 21854194 is about 4674.8469493664. The cubic root of 21854194 is about 279.5835390428.

The spelling of 21854194 in words is "twenty-one million, eight hundred fifty-four thousand, one hundred ninety-four".