21950470 has 8 divisors (see below), whose sum is σ = 39510864. Its totient is φ = 8780184.

The previous prime is 21950459. The next prime is 21950483. The reversal of 21950470 is 7405912.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097514 + ... + 1097533.

It is an arithmetic number, because the mean of its divisors is an integer number (4938858).

Almost surely, 2^21950470 is an apocalyptic number.

21950470 is a deficient number, since it is larger than the sum of its proper divisors (17560394).

21950470 is a wasteful number, since it uses less digits than its factorization.

21950470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195054.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 21950470 is about 4685.1328689803. The cubic root of 21950470 is about 279.9934947468.

The spelling of 21950470 in words is "twenty-one million, nine hundred fifty thousand, four hundred seventy".