20461249 has 8 divisors (see below), whose sum is σ = 21127392. Its totient is φ = 19803840.

The previous prime is 20461223. The next prime is 20461253. The reversal of 20461249 is 94216402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20461249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20461279) 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, 2754 + ... + 6964.

It is an arithmetic number, because the mean of its divisors is an integer number (2640924).

Almost surely, 2^20461249 is an apocalyptic number.

It is an amenable number.

20461249 is a deficient number, since it is larger than the sum of its proper divisors (666143).

20461249 is a wasteful number, since it uses less digits than its factorization.

20461249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367.

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

The square root of 20461249 is about 4523.4112127906. The cubic root of 20461249 is about 273.5126265996.

The spelling of 20461249 in words is "twenty million, four hundred sixty-one thousand, two hundred forty-nine".