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20080049 = 111825459
BaseRepresentation
bin100110010011…
…0010110110001
31101210011122112
41030212112301
520120030144
61554215105
7332451263
oct114462661
941704575
1020080049
1110375490
126884495
1342109b2
142949b33
151b6999e
hex13265b1

20080049 has 4 divisors (see below), whose sum is σ = 21905520. Its totient is φ = 18254580.

The previous prime is 20080031. The next prime is 20080069. The reversal of 20080049 is 94008002.

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.

It is a cyclic number.

It is not a de Polignac number, because 20080049 - 28 = 20079793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20080069) 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, 912719 + ... + 912740.

It is an arithmetic number, because the mean of its divisors is an integer number (5476380).

Almost surely, 220080049 is an apocalyptic number.

It is an amenable number.

20080049 is a deficient number, since it is larger than the sum of its proper divisors (1825471).

20080049 is a wasteful number, since it uses less digits than its factorization.

20080049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825470.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20080049 is about 4481.0767679209. The cubic root of 20080049 is about 271.8034236028.

The spelling of 20080049 in words is "twenty million, eighty thousand, forty-nine".

Divisors: 1 11 1825459 20080049