20612449 has 32 divisors (see below), whose sum is σ = 26248320. Its totient is φ = 15897600.

The previous prime is 20612447. The next prime is 20612453. The reversal of 20612449 is 94421602.

It is a cyclic number.

It is not a de Polignac number, because 20612449 - 2¹ = 20612447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20612447) 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 31 ways as a sum of consecutive naturals, for example, 148222 + ... + 148360.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^20612449 is an apocalyptic number.

It is an amenable number.

20612449 is a deficient number, since it is larger than the sum of its proper divisors (5635871).

20612449 is a wasteful number, since it uses less digits than its factorization.

20612449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20612449 is about 4540.0935012398. The cubic root of 20612449 is about 274.1846882071.

The spelling of 20612449 in words is "twenty million, six hundred twelve thousand, four hundred forty-nine".