20879461 has 8 divisors (see below), whose sum is σ = 22688000. Its totient is φ = 19141920.

The previous prime is 20879459. The next prime is 20879477. The reversal of 20879461 is 16497802.

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 20879461 - 2¹ = 20879459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20879461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20879401) 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, 17136 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (2836000).

Almost surely, 2^20879461 is an apocalyptic number.

20879461 is the 2044-th centered decagonal number.

It is an amenable number.

20879461 is a deficient number, since it is larger than the sum of its proper divisors (1808539).

20879461 is a wasteful number, since it uses less digits than its factorization.

20879461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35499.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20879461 is about 4569.4048846650. The cubic root of 20879461 is about 275.3635346427.

The spelling of 20879461 in words is "twenty million, eight hundred seventy-nine thousand, four hundred sixty-one".