20546609 has 8 divisors (see below), whose sum is σ = 20845440. Its totient is φ = 20250000.

The previous prime is 20546597. The next prime is 20546623. The reversal of 20546609 is 90664502.

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 20546609 - 2⁴ = 20546593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20546909) 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, 26984 + ... + 27734.

It is an arithmetic number, because the mean of its divisors is an integer number (2605680).

Almost surely, 2^20546609 is an apocalyptic number.

It is an amenable number.

20546609 is a deficient number, since it is larger than the sum of its proper divisors (298831).

20546609 is a wasteful number, since it uses less digits than its factorization.

20546609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20546609 is about 4532.8367497628. The cubic root of 20546609 is about 273.8924445104.

The spelling of 20546609 in words is "twenty million, five hundred forty-six thousand, six hundred nine".