20255701 has 4 divisors (see below), whose sum is σ = 20269900. Its totient is φ = 20241504.

The previous prime is 20255689. The next prime is 20255723. The reversal of 20255701 is 10755202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11553201 + 8702500 = 3399^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 20255701 - 2¹³ = 20247509 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 (20255771) 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 3 ways as a sum of consecutive naturals, for example, 4686 + ... + 7903.

It is an arithmetic number, because the mean of its divisors is an integer number (5067475).

Almost surely, 2^20255701 is an apocalyptic number.

It is an amenable number.

20255701 is a deficient number, since it is larger than the sum of its proper divisors (14199).

20255701 is a wasteful number, since it uses less digits than its factorization.

20255701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20255701 is about 4500.6333998672. The cubic root of 20255701 is about 272.5936653013.

The spelling of 20255701 in words is "twenty million, two hundred fifty-five thousand, seven hundred one".