20255601 has 8 divisors (see below), whose sum is σ = 27938880. Its totient is φ = 13038032.

The previous prime is 20255591. The next prime is 20255603. The reversal of 20255601 is 10655202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20255601 - 2¹¹ = 20253553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20255603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116325 + ... + 116498.

It is an arithmetic number, because the mean of its divisors is an integer number (3492360).

Almost surely, 2^20255601 is an apocalyptic number.

It is an amenable number.

20255601 is a deficient number, since it is larger than the sum of its proper divisors (7683279).

20255601 is a wasteful number, since it uses less digits than its factorization.

20255601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232855.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20255601 is about 4500.6222903061. The cubic root of 20255601 is about 272.5932167130.

It can be divided in two parts, 2025 and 5601, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 20255601 in words is "twenty million, two hundred fifty-five thousand, six hundred one".