20541885 has 64 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 8524800.

The previous prime is 20541883. The next prime is 20541887. The reversal of 20541885 is 58814502.

It is an interprime number because it is at equal distance from previous prime (20541883) and next prime (20541887).

It is not a de Polignac number, because 20541885 - 2¹ = 20541883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 137791 + ... + 137939.

It is an arithmetic number, because the mean of its divisors is an integer number (642600).

Almost surely, 2^20541885 is an apocalyptic number.

It is an amenable number.

20541885 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20541885 is a wasteful number, since it uses less digits than its factorization.

20541885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 20541885 is about 4532.3156333159. The cubic root of 20541885 is about 273.8714521238.

The spelling of 20541885 in words is "twenty million, five hundred forty-one thousand, eight hundred eighty-five".