20041851 has 8 divisors (see below), whose sum is σ = 26840080. Its totient is φ = 13302432.

The previous prime is 20041817. The next prime is 20041859. The reversal of 20041851 is 15814002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20041851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20041859) 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, 13900 + ... + 15273.

It is an arithmetic number, because the mean of its divisors is an integer number (3355010).

Almost surely, 2^20041851 is an apocalyptic number.

20041851 is a deficient number, since it is larger than the sum of its proper divisors (6798229).

20041851 is a wasteful number, since it uses less digits than its factorization.

20041851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29405.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20041851 is about 4476.8125937993. The cubic root of 20041851 is about 271.6309649012.

Adding to 20041851 its reverse (15814002), we get a palindrome (35855853).

The spelling of 20041851 in words is "twenty million, forty-one thousand, eight hundred fifty-one".