20256067 has 8 divisors (see below), whose sum is σ = 22078224. Its totient is φ = 18471648.

The previous prime is 20256037. The next prime is 20256073. The reversal of 20256067 is 76065202.

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-20256067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20256037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8308 + ... + 10465.

It is an arithmetic number, because the mean of its divisors is an integer number (2759778).

Almost surely, 2^20256067 is an apocalyptic number.

20256067 is a deficient number, since it is larger than the sum of its proper divisors (1822157).

20256067 is a wasteful number, since it uses less digits than its factorization.

20256067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18869.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20256067 is about 4500.6740606269. The cubic root of 20256067 is about 272.5953071219.

The spelling of 20256067 in words is "twenty million, two hundred fifty-six thousand, sixty-seven".