20461679 has 8 divisors (see below), whose sum is σ = 23928960. Its totient is φ = 17130456.

The previous prime is 20461673. The next prime is 20461699. The reversal of 20461679 is 97616402.

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

It is not a de Polignac number, because 20461679 - 2¹² = 20457583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33689 + ... + 34290.

It is an arithmetic number, because the mean of its divisors is an integer number (2991120).

Almost surely, 2^20461679 is an apocalyptic number.

20461679 is a deficient number, since it is larger than the sum of its proper divisors (3467281).

20461679 is an equidigital number, since it uses as much as digits as its factorization.

20461679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68029.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20461679 is about 4523.4587430417. The cubic root of 20461679 is about 273.5145425727.

The spelling of 20461679 in words is "twenty million, four hundred sixty-one thousand, six hundred seventy-nine".