20612249 has 8 divisors (see below), whose sum is σ = 23584320. Its totient is φ = 17647056.

The previous prime is 20612239. The next prime is 20612269. The reversal of 20612249 is 94221602.

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

It is not a de Polignac number, because 20612249 - 2⁴ = 20612233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20612239) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11102 + ... + 12824.

It is an arithmetic number, because the mean of its divisors is an integer number (2948040).

Almost surely, 2^20612249 is an apocalyptic number.

It is an amenable number.

20612249 is a deficient number, since it is larger than the sum of its proper divisors (2972071).

20612249 is a wasteful number, since it uses less digits than its factorization.

20612249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20612249 is about 4540.0714752083. The cubic root of 20612249 is about 274.1838014110.

The spelling of 20612249 in words is "twenty million, six hundred twelve thousand, two hundred forty-nine".