20368867 has 4 divisors (see below), whose sum is σ = 20424736. Its totient is φ = 20313000.

The previous prime is 20368853. The next prime is 20368877. The reversal of 20368867 is 76886302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76886302 = 2 ⋅38443151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20368867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20368837) 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, 27384 + ... + 28117.

It is an arithmetic number, because the mean of its divisors is an integer number (5106184).

Almost surely, 2^20368867 is an apocalyptic number.

20368867 is a deficient number, since it is larger than the sum of its proper divisors (55869).

20368867 is an equidigital number, since it uses as much as digits as its factorization.

20368867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55868.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 20368867 is about 4513.1881192789. The cubic root of 20368867 is about 273.1003714350.

The spelling of 20368867 in words is "twenty million, three hundred sixty-eight thousand, eight hundred sixty-seven".