20368851 has 4 divisors (see below), whose sum is σ = 27158472. Its totient is φ = 13579232.

The previous prime is 20368849. The next prime is 20368853. The reversal of 20368851 is 15886302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20368849) and next prime (20368853).

It is a cyclic number.

It is not a de Polignac number, because 20368851 - 2¹ = 20368849 is a prime.

It is a super-3 number, since 3×20368851³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20368853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3394806 + ... + 3394811.

It is an arithmetic number, because the mean of its divisors is an integer number (6789618).

Almost surely, 2^20368851 is an apocalyptic number.

20368851 is a deficient number, since it is larger than the sum of its proper divisors (6789621).

20368851 is an equidigital number, since it uses as much as digits as its factorization.

20368851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6789620.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 20368851 is about 4513.1863466956. The cubic root of 20368851 is about 273.1002999270.

The spelling of 20368851 in words is "twenty million, three hundred sixty-eight thousand, eight hundred fifty-one".