20541859 has 8 divisors (see below), whose sum is σ = 22240512. Its totient is φ = 18860160.

The previous prime is 20541841. The next prime is 20541863. The reversal of 20541859 is 95814502.

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 20541859 - 2⁵ = 20541827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541839) 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, 1654 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (2780064).

Almost surely, 2^20541859 is an apocalyptic number.

20541859 is a deficient number, since it is larger than the sum of its proper divisors (1698653).

20541859 is a wasteful number, since it uses less digits than its factorization.

20541859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 20541859 is about 4532.3127650241. The cubic root of 20541859 is about 273.8713365768.

The spelling of 20541859 in words is "twenty million, five hundred forty-one thousand, eight hundred fifty-nine".