21949194 has 8 divisors (see below), whose sum is σ = 43898400. Its totient is φ = 7316396.

The previous prime is 21949183. The next prime is 21949211. The reversal of 21949194 is 49194912.

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

21949194 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

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, 1829094 + ... + 1829105.

It is an arithmetic number, because the mean of its divisors is an integer number (5487300).

Almost surely, 2^21949194 is an apocalyptic number.

21949194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21949194 is a wasteful number, since it uses less digits than its factorization.

21949194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658204.

The product of its digits is 23328, while the sum is 39.

The square root of 21949194 is about 4684.9966915677. The cubic root of 21949194 is about 279.9880692195.

The spelling of 21949194 in words is "twenty-one million, nine hundred forty-nine thousand, one hundred ninety-four".