20185242 has 32 divisors (see below), whose sum is σ = 50333184. Its totient is φ = 5242800.

The previous prime is 20185241. The next prime is 20185259. The reversal of 20185242 is 24258102.

It is not an unprimeable number, because it can be changed into a prime (20185241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21384 + ... + 22307.

It is an arithmetic number, because the mean of its divisors is an integer number (1572912).

Almost surely, 2^20185242 is an apocalyptic number.

20185242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20185242 is an abundant number, since it is smaller than the sum of its proper divisors (30147942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20185242 is a wasteful number, since it uses less digits than its factorization.

20185242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43714.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20185242 is about 4492.7989049144. The cubic root of 20185242 is about 272.2772278006.

It can be divided in two parts, 2018 and 5242, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 20185242 in words is "twenty million, one hundred eighty-five thousand, two hundred forty-two".