Base | Representation |
---|---|
bin | 100100101110010100… |
… | …001001101001110101 |
3 | 10202210001202221100121 |
4 | 210232110021221311 |
5 | 1121224011140041 |
6 | 30040435011541 |
7 | 2564104155112 |
oct | 445624115165 |
9 | 122701687317 |
10 | 39431740021 |
11 | 157a52099a3 |
12 | 7785739bb1 |
13 | 394541a95b |
14 | 1ca0d27909 |
15 | 105bb887d1 |
hex | 92e509a75 |
39431740021 has 4 divisors (see below), whose sum is σ = 39434483500. Its totient is φ = 39428996544.
The previous prime is 39431740013. The next prime is 39431740031. The reversal of 39431740021 is 12004713493.
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 32126619121 + 7305120900 = 179239^2 + 85470^2 .
It is a cyclic number.
It is not a de Polignac number, because 39431740021 - 23 = 39431740013 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 (39431740031) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350066 + ... + 1378963.
It is an arithmetic number, because the mean of its divisors is an integer number (9858620875).
Almost surely, 239431740021 is an apocalyptic number.
It is an amenable number.
39431740021 is a deficient number, since it is larger than the sum of its proper divisors (2743479).
39431740021 is a wasteful number, since it uses less digits than its factorization.
39431740021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2743478.
The product of its (nonzero) digits is 18144, while the sum is 34.
The spelling of 39431740021 in words is "thirty-nine billion, four hundred thirty-one million, seven hundred forty thousand, twenty-one".
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