21960245 has 8 divisors (see below), whose sum is σ = 27202560. Its totient is φ = 17001360.

The previous prime is 21960199. The next prime is 21960251. The reversal of 21960245 is 54206912.

It is a happy number.

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

It is not a de Polignac number, because 21960245 - 2¹⁰ = 21959221 is a prime.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 70685 + ... + 70994.

It is an arithmetic number, because the mean of its divisors is an integer number (3400320).

Almost surely, 2^21960245 is an apocalyptic number.

It is an amenable number.

21960245 is a deficient number, since it is larger than the sum of its proper divisors (5242315).

21960245 is a wasteful number, since it uses less digits than its factorization.

21960245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141715.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 21960245 is about 4686.1759463341. The cubic root of 21960245 is about 280.0350508842.

The spelling of 21960245 in words is "twenty-one million, nine hundred sixty thousand, two hundred forty-five".