21676194 has 16 divisors (see below), whose sum is σ = 48169440. Its totient is φ = 7225380.

The previous prime is 21676181. The next prime is 21676199. The reversal of 21676194 is 49167612.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21676199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200652 + ... + 200759.

It is an arithmetic number, because the mean of its divisors is an integer number (3010590).

Almost surely, 2^21676194 is an apocalyptic number.

21676194 is an abundant number, since it is smaller than the sum of its proper divisors (26493246).

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

21676194 is a wasteful number, since it uses less digits than its factorization.

21676194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401422 (or 401416 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 21676194 is about 4655.7699685444. The cubic root of 21676194 is about 278.8224098186.

The spelling of 21676194 in words is "twenty-one million, six hundred seventy-six thousand, one hundred ninety-four".