21956054 has 8 divisors (see below), whose sum is σ = 33038928. Its totient is φ = 10943080.

The previous prime is 21956041. The next prime is 21956069. The reversal of 21956054 is 45065912.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21956054.

It is a congruent 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, 16682 + ... + 17949.

It is an arithmetic number, because the mean of its divisors is an integer number (4129866).

Almost surely, 2^21956054 is an apocalyptic number.

21956054 is a deficient number, since it is larger than the sum of its proper divisors (11082874).

21956054 is a wasteful number, since it uses less digits than its factorization.

21956054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34950.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 21956054 is about 4685.7287586884. The cubic root of 21956054 is about 280.0172353336.

The spelling of 21956054 in words is "twenty-one million, nine hundred fifty-six thousand, fifty-four".