21958348 has 12 divisors (see below), whose sum is σ = 38610712. Its totient is φ = 10926720.

The previous prime is 21958303. The next prime is 21958361. The reversal of 21958348 is 84385912.

It is a self number, because there is not a number n which added to its sum of digits gives 21958348.

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, 12165 + ... + 13852.

Almost surely, 2^21958348 is an apocalyptic number.

It is an amenable number.

21958348 is a deficient number, since it is larger than the sum of its proper divisors (16652364).

21958348 is a wasteful number, since it uses less digits than its factorization.

21958348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26232 (or 26230 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 21958348 is about 4685.9735381242. The cubic root of 21958348 is about 280.0269871947.

The spelling of 21958348 in words is "twenty-one million, nine hundred fifty-eight thousand, three hundred forty-eight".