20185011 has 96 divisors (see below), whose sum is σ = 40492800. Its totient is φ = 9797760.

The previous prime is 20185003. The next prime is 20185031. The reversal of 20185011 is 11058102.

It is not a de Polignac number, because 20185011 - 2³ = 20185003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20185031) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 276471 + ... + 276543.

It is an arithmetic number, because the mean of its divisors is an integer number (421800).

Almost surely, 2^20185011 is an apocalyptic number.

20185011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20185011 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20185011 is a wasteful number, since it uses less digits than its factorization.

20185011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 20185011 is about 4492.7731970354. The cubic root of 20185011 is about 272.2761891494.

The spelling of 20185011 in words is "twenty million, one hundred eighty-five thousand, eleven".