[go: up one dir, main page]

Search a number
-
+
20260769 = 23880903
BaseRepresentation
bin100110101001…
…0011110100001
31102010100112212
41031102132201
520141321034
62002131505
7334133204
oct115223641
942110485
1020260769
1110489241
126950b95
134275029
14299593b
151ba32ce
hex13527a1

20260769 has 4 divisors (see below), whose sum is σ = 21141696. Its totient is φ = 19379844.

The previous prime is 20260741. The next prime is 20260781. The reversal of 20260769 is 96706202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96706202 = 248353101.

It is a cyclic number.

It is not a de Polignac number, because 20260769 - 224 = 3483553 is a prime.

It is a super-2 number, since 2×202607692 = 820997520942722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20260729) 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, 440429 + ... + 440474.

It is an arithmetic number, because the mean of its divisors is an integer number (5285424).

Almost surely, 220260769 is an apocalyptic number.

It is an amenable number.

20260769 is a deficient number, since it is larger than the sum of its proper divisors (880927).

20260769 is an equidigital number, since it uses as much as digits as its factorization.

20260769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880926.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20260769 is about 4501.1963965150. The cubic root of 20260769 is about 272.6163978231.

The spelling of 20260769 in words is "twenty million, two hundred sixty thousand, seven hundred sixty-nine".

Divisors: 1 23 880903 20260769