20256071 has 12 divisors (see below), whose sum is σ = 23326344. Its totient is φ = 17442000.

The previous prime is 20256037. The next prime is 20256073. The reversal of 20256071 is 17065202.

It is not a de Polignac number, because 20256071 - 2¹⁸ = 19993927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1421 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (1943862).

Almost surely, 2^20256071 is an apocalyptic number.

20256071 is a deficient number, since it is larger than the sum of its proper divisors (3070273).

20256071 is a wasteful number, since it uses less digits than its factorization.

20256071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5150 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20256071 is about 4500.6745050048. The cubic root of 20256071 is about 272.5953250652.

The spelling of 20256071 in words is "twenty million, two hundred fifty-six thousand, seventy-one".