20675249 has 8 divisors (see below), whose sum is σ = 24872640. Its totient is φ = 16788816.

The previous prime is 20675227. The next prime is 20675251. The reversal of 20675249 is 94257602.

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

It is a cyclic number.

It is not a de Polignac number, because 20675249 - 2⁸ = 20674993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20671249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77594 + ... + 77859.

It is an arithmetic number, because the mean of its divisors is an integer number (3109080).

Almost surely, 2^20675249 is an apocalyptic number.

It is an amenable number.

20675249 is a deficient number, since it is larger than the sum of its proper divisors (4197391).

20675249 is a wasteful number, since it uses less digits than its factorization.

20675249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155479.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20675249 is about 4547.0043985024. The cubic root of 20675249 is about 274.4628589556.

The spelling of 20675249 in words is "twenty million, six hundred seventy-five thousand, two hundred forty-nine".