21956192 has 12 divisors (see below), whose sum is σ = 43226316. Its totient is φ = 10978080.

The previous prime is 21956159. The next prime is 21956227. The reversal of 21956192 is 29165912.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343034 + ... + 343097.

It is an arithmetic number, because the mean of its divisors is an integer number (3602193).

Almost surely, 2^21956192 is an apocalyptic number.

It is an amenable number.

21956192 is a deficient number, since it is larger than the sum of its proper divisors (21270124).

21956192 is an equidigital number, since it uses as much as digits as its factorization.

21956192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686141 (or 686133 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 21956192 is about 4685.7434842296. The cubic root of 21956192 is about 280.0178219949.

The spelling of 21956192 in words is "twenty-one million, nine hundred fifty-six thousand, one hundred ninety-two".