2006745869 has 4 divisors (see below), whose sum is σ = 2024504796. Its totient is φ = 1988986944.

The previous prime is 2006745823. The next prime is 2006745889. The reversal of 2006745869 is 9685476002.

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 109098025 + 1897647844 = 10445^2 + 43562^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006745869 - 2²⁰ = 2005697293 is a prime.

It is a super-2 number, since 2×2006745869² = 8054057965497130322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006745809) 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, 8879294 + ... + 8879519.

It is an arithmetic number, because the mean of its divisors is an integer number (506126199).

Almost surely, 2^2006745869 is an apocalyptic number.

It is an amenable number.

2006745869 is a deficient number, since it is larger than the sum of its proper divisors (17758927).

2006745869 is a wasteful number, since it uses less digits than its factorization.

2006745869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17758926.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 2006745869 is about 44796.7171676675. The cubic root of 2006745869 is about 1261.3360039616.

The spelling of 2006745869 in words is "two billion, six million, seven hundred forty-five thousand, eight hundred sixty-nine".